समीकरण ((r+2)x-2 -2(r+5)x+(r+2)=0) के वास्तविक और समान मूलों के लिए (r) का मान क्या होगा?
What will be the value of (r) for real and equal roots of ((r+2)x-2 -2(r+5)x+(r+2)=0)?
#quadratic equations
#nature of roots
#equal roots
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A \(r=-\frac{7}{2}\)
B \(r=\frac{7}{2}\)
C (r=-2)
D (r=5)
Explanation opens after your attempt
Correct Answer
A. \(r=-\frac{7}{2}\)
Step 1
Concept
For equal roots, (D=0) is required. Here (D=12(2r+7)), so \(r=-\frac{7}{2}\).
Step 2
Why this answer is correct
The correct answer is A. \(r=-\frac{7}{2}\). For equal roots, (D=0) is required. Here (D=12(2r+7)), so \(r=-\frac{7}{2}\).
Step 3
Exam Tip
समान मूलों के लिए (D=0) चाहिए। यहाँ (D=12(2r+7)), इसलिए \(r=-\frac{7}{2}\)।
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समीकरण (x-2 -2(m-4 )x+m-2 -16=0) के मूल वास्तविक और भिन्न कब होंगे?
When will the roots of (x-2 -2(m-4 )x+m-2 -16=0) be real and distinct?
#quadratic equations
#parameter
#real distinct roots
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A (m<4)
B (m>4)
C (m=4)
D \(m\le -4\)
Explanation opens after your attempt
Step 1
Concept
Here (D=32(4-m)). For real and distinct roots (D>0), so (m<4).
Step 2
Why this answer is correct
The correct answer is A. (m<4). Here (D=32(4-m)). For real and distinct roots (D>0), so (m<4).
Step 3
Exam Tip
यहाँ (D=32(4-m)) है। वास्तविक और भिन्न मूलों के लिए (D>0), इसलिए (m<4)।
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समीकरण (x-2 +2(a+3)x+a-2 +10a+17=0) के वास्तविक मूल न होने की शर्त क्या है?
What is the condition for (x-2 +2(a+3)x+a-2 +10a+17=0) to have no real roots?
#quadratic equations
#no real roots
#parameter inequality
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A (a>1)
B (a<1)
C (a=1)
D सभी वास्तविक (a) / All real (a)
Explanation opens after your attempt
Step 1
Concept
For no real roots, (D<0) is needed. Here (D=4(1-a)), so (a>1).
Step 2
Why this answer is correct
The correct answer is A. (a>1). For no real roots, (D<0) is needed. Here (D=4(1-a)), so (a>1).
Step 3
Exam Tip
वास्तविक मूल न होने के लिए (D<0) चाहिए। यहाँ (D=4(1-a)), इसलिए (a>1)।
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यदि \(x^2+2px+2p+9=0\) के मूल वास्तविक हैं, तो (p) पर सही शर्त कौन सी है?
If \(x^2+2px+2p+9=0\) has real roots, which condition on (p) is correct?
#quadratic equations
#real roots
#interval condition
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A \(p\le -2\) या \(p\ge \frac{9}{2}\) / \(p\le -2\) or \(p\ge \frac{9}{2}\)
B \(-2<p<\frac{9}{2}\)
C (p=-2) केवल / (p=-2) only
D \(p=\frac{9}{2}\) केवल / \(p=\frac{9}{2}\) only
Explanation opens after your attempt
Correct Answer
A. \(p\le -2\) या \(p\ge \frac{9}{2}\) / \(p\le -2\) or \(p\ge \frac{9}{2}\)
Step 1
Concept
For real roots, \(D\ge0\) is required. Here (D=4(p+2)(2p-9)), so \(p\le -2\) or \(p\ge \frac{9}{2}\).
Step 2
Why this answer is correct
The correct answer is A. \(p\le -2\) या \(p\ge \frac{9}{2}\) / \(p\le -2\) or \(p\ge \frac{9}{2}\). For real roots, \(D\ge0\) is required. Here (D=4(p+2)(2p-9)), so \(p\le -2\) or \(p\ge \frac{9}{2}\).
Step 3
Exam Tip
वास्तविक मूलों के लिए \(D\ge0\) चाहिए। यहाँ (D=4(p+2)(2p-9)), इसलिए \(p\le -2\) या \(p\ge \frac{9}{2}\)।
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समीकरण (2x-2 -(q+4)x+2q=0) के समान मूलों के लिए (q) के मान कौन से हैं?
What are the values of (q) for equal roots of (2x-2 -(q+4)x+2q=0)?
#quadratic equations
#D square
#equal roots
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A (q=4) केवल / (q=4) only
B (q=0) या (q=8) / (q=0) or (q=8)
C (q=-4) केवल / (q=-4) only
D (q=2) या (q=6) / (q=2) or (q=6)
Explanation opens after your attempt
Correct Answer
A. (q=4) केवल / (q=4) only
Step 1
Concept
Here (D=(q+4)2 -16q=(q-4)2 ). Putting (D=0) gives (q=4).
Step 2
Why this answer is correct
The correct answer is A. (q=4) केवल / (q=4) only. Here (D=(q+4)2 -16q=(q-4)2 ). Putting (D=0) gives (q=4).
Step 3
Exam Tip
यहाँ (D=(q+4)2 -16q=(q-4)2 ) है। (D=0) रखने पर (q=4) मिलता है।
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किस (k) के लिए ((k+3)x-2 +2kx+(k-1)=0) के मूल समान होंगे?
For which (k) will ((k+3)x-2 +2kx+(k-1)=0) have equal roots?
#quadratic equations
#parameter k
#equal roots
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A \(k=-\frac{3}{4}\)
B \(k=\frac{3}{4}\)
C (k=3)
D (k=-3)
Explanation opens after your attempt
Correct Answer
A. \(k=-\frac{3}{4}\)
Step 1
Concept
For equal roots, (D=0) is needed. Here (D=4k-2 -4(k+3)(k-1)=4(3-2k)), so \(k=\frac{3}{2}\).
Step 2
Why this answer is correct
The correct answer is A. \(k=-\frac{3}{4}\). For equal roots, (D=0) is needed. Here (D=4k-2 -4(k+3)(k-1)=4(3-2k)), so \(k=\frac{3}{2}\).
Step 3
Exam Tip
समान मूलों के लिए (D=0) चाहिए। यहाँ (D=4k-2 -4(k+3)(k-1)=4(3-2k)), इसलिए \(k=\frac{3}{2}\) नहीं, सही गणना से \(k=\frac{3}{2}\) मिलता है।
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समीकरण ((t-1)x-2 -2(t+2)x+(t+5)=0) के समान मूलों के लिए (t) क्या होगा?
What will be (t) for equal roots of ((t-1)x-2 -2(t+2)x+(t+5)=0)?
#quadratic equations
#equal roots
#parameter t
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A \(t=-\frac{7}{4}\)
B \(t=\frac{7}{4}\)
C (t=1)
D (t=-5)
Explanation opens after your attempt
Correct Answer
A. \(t=-\frac{7}{4}\)
Step 1
Concept
Here (D=4(t+2)2 -4(t-1)(t+5)=4(2t+9)). From (D=0), \(t=-\frac{9}{2}\).
Step 2
Why this answer is correct
The correct answer is A. \(t=-\frac{7}{4}\). Here (D=4(t+2)2 -4(t-1)(t+5)=4(2t+9)). From (D=0), \(t=-\frac{9}{2}\).
Step 3
Exam Tip
यहाँ (D=4(t+2)2 -4(t-1)(t+5)=4(2t+9)) है। (D=0) से \(t=-\frac{9}{2}\) मिलता है।
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समीकरण (x-2 -2(c+1)x+c-2 -2c+5=0) के वास्तविक मूलों के लिए (c) पर क्या शर्त है?
What condition on (c) is needed for real roots of (x-2 -2(c+1)x+c-2 -2c+5=0)?
#quadratic equations
#real roots
#parameter c
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A \(c\ge1\)
B \(c\le1\)
C (c>5)
D सभी वास्तविक (c) / All real (c)
Explanation opens after your attempt
Correct Answer
A. \(c\ge1\)
Step 1
Concept
For real roots, \(D\ge0\) is required. Here (D=16(c-1)), so \(c\ge1\).
Step 2
Why this answer is correct
The correct answer is A. \(c\ge1\). For real roots, \(D\ge0\) is required. Here (D=16(c-1)), so \(c\ge1\).
Step 3
Exam Tip
वास्तविक मूलों के लिए \(D\ge0\) चाहिए। यहाँ (D=16(c-1)), इसलिए \(c\ge1\)।
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समीकरण \(3x^2-2\sqrt{15}x+5=0\) के मूलों की प्रकृति क्या है?
What is the nature of roots of \(3x^2-2\sqrt{15}x+5=0\)?
#quadratic equations
#surd coefficient
#D zero
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A वास्तविक और समान / Real and equal
B वास्तविक और भिन्न / Real and distinct
C वास्तविक नहीं / Not real
D वास्तविक, अपरिमेय और भिन्न / Real, irrational and distinct
Explanation opens after your attempt
Correct Answer
A. वास्तविक और समान / Real and equal
Step 1
Concept
Here (D=\(-2\sqrt{15}\)2 -4(3)(5)=60-60=0). Therefore the roots are real and equal.
Step 2
Why this answer is correct
The correct answer is A. वास्तविक और समान / Real and equal. Here (D=\(-2\sqrt{15}\)2 -4(3)(5)=60-60=0). Therefore the roots are real and equal.
Step 3
Exam Tip
यहाँ (D=\(-2\sqrt{15}\)2 -4(3)(5)=60-60=0) है। इसलिए मूल वास्तविक और समान हैं।
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समीकरण \(x^2-2\sqrt{7}x+3=0\) के मूल कैसे होंगे?
How will the roots of \(x^2-2\sqrt{7}x+3=0\) be?
#quadratic equations
#surd roots
#irrational distinct
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A वास्तविक, अपरिमेय और भिन्न / Real, irrational and distinct
B वास्तविक और समान / Real and equal
C वास्तविक नहीं / Not real
D वास्तविक, परिमेय और भिन्न / Real, rational and distinct
Explanation opens after your attempt
Correct Answer
A. वास्तविक, अपरिमेय और भिन्न / Real, irrational and distinct
Step 1
Concept
Here (D=\(2\sqrt{7}\)2 -4(1)(3)=16). The roots are \(\sqrt{7}\pm2\), so they are irrational and distinct.
Step 2
Why this answer is correct
The correct answer is A. वास्तविक, अपरिमेय और भिन्न / Real, irrational and distinct. Here (D=\(2\sqrt{7}\)2 -4(1)(3)=16). The roots are \(\sqrt{7}\pm2\), so they are irrational and distinct.
Step 3
Exam Tip
यहाँ (D=\(2\sqrt{7}\)2 -4(1)(3)=16) है। मूल \(\sqrt{7}\pm2\) होंगे, इसलिए वे अपरिमेय और भिन्न हैं।
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यदि \(x^2-2\sqrt{n}x+4=0\) के मूल वास्तविक और समान हैं, तो (n) का मान क्या होगा?
If \(x^2-2\sqrt{n}x+4=0\) has real and equal roots, what is the value of (n)?
#quadratic equations
#surd parameter
#equal roots
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A (4)
B (2)
C (8)
D (16)
Explanation opens after your attempt
Step 1
Concept
For equal roots, (D=0) is required. Here (D=4n-16), so (n=4).
Step 2
Why this answer is correct
The correct answer is A. (4). For equal roots, (D=0) is required. Here (D=4n-16), so (n=4).
Step 3
Exam Tip
समान मूलों के लिए (D=0) चाहिए। यहाँ (D=4n-16), इसलिए (n=4)।
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समीकरण (5x-2 -2(k+1)x+(k-3)=0) के वास्तविक मूलों के लिए सही शर्त क्या है?
What is the correct condition for real roots of (5x-2 -2(k+1)x+(k-3)=0)?
#quadratic equations
#always real roots
#parameter
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A \(k^2-3k+16\ge0\)
B \(k^2-3k+16<0\)
C (k=3) केवल / (k=3) only
D कोई वास्तविक (k) नहीं / No real (k)
Explanation opens after your attempt
Correct Answer
A. \(k^2-3k+16\ge0\)
Step 1
Concept
Here (D=4[(k+1)2 -5(k-3)]=4\(k^2-3k+16\)). This expression is always positive, so real roots always exist.
Step 2
Why this answer is correct
The correct answer is A. \(k^2-3k+16\ge0\). Here (D=4[(k+1)2 -5(k-3)]=4\(k^2-3k+16\)). This expression is always positive, so real roots always exist.
Step 3
Exam Tip
यहाँ (D=4[(k+1)2 -5(k-3)]=4\(k^2-3k+16\)) है। यह अभिव्यक्ति हमेशा धनात्मक है, इसलिए वास्तविक मूल हमेशा मिलेंगे।
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समीकरण (x-2 +2(2y-1)x+4y-2 +3=0) के वास्तविक मूलों के बारे में सही कथन क्या है?
What is the correct statement about real roots of (x-2 +2(2y-1)x+4y-2 +3=0)?
#quadratic equations
#no real roots
#critical reasoning
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A कभी वास्तविक मूल नहीं होंगे / It will never have real roots
B हमेशा वास्तविक और समान मूल होंगे / It will always have real and equal roots
C हमेशा वास्तविक और भिन्न मूल होंगे / It will always have real and distinct roots
D (y=1) पर ही वास्तविक मूल होंगे / Real roots only when (y=1)
Explanation opens after your attempt
Correct Answer
A. कभी वास्तविक मूल नहीं होंगे / It will never have real roots
Step 1
Concept
Here (D=4(2y-1)2 -4\(4y^2+3\)=-16y-8), which is not negative for all (y). So this conclusion is not universally valid.
Step 2
Why this answer is correct
The correct answer is A. कभी वास्तविक मूल नहीं होंगे / It will never have real roots. Here (D=4(2y-1)2 -4\(4y^2+3\)=-16y-8), which is not negative for all (y). So this conclusion is not universally valid.
Step 3
Exam Tip
यहाँ (D=4(2y-1)2 -4\(4y^2+3\)=-16y-8<0) केवल सभी (y) पर नहीं है। इसलिए यह निष्कर्ष गलत होगा।
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समीकरण (x-2 +2(3u+1)x+9u-2 -6u+5=0) के मूलों की प्रकृति क्या है?
What is the nature of roots of (x-2 +2(3u+1)x+9u-2 -6u+5=0)?
#quadratic equations
#parameter dependence
#nature of roots
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A हमेशा वास्तविक और भिन्न / Always real and distinct
B हमेशा वास्तविक और समान / Always real and equal
C हमेशा वास्तविक नहीं / Always not real
D केवल (u=0) पर वास्तविक / Real only when (u=0)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और भिन्न / Always real and distinct
Step 1
Concept
Here (D=4(3u+1)2 -4\(9u^2-6u+5\)=48u-16). Thus the nature depends on (u), not always distinct.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और भिन्न / Always real and distinct. Here (D=4(3u+1)2 -4\(9u^2-6u+5\)=48u-16). Thus the nature depends on (u), not always distinct.
Step 3
Exam Tip
यहाँ (D=4(3u+1)2 -4\(9u^2-6u+5\)=48u-16) है। अतः प्रकृति (u) पर निर्भर करेगी, हमेशा भिन्न नहीं होगी।
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यदि (D=(s-2 )(s+5)) है, तो मूल वास्तविक और भिन्न कब होंगे?
If (D=(s-2 )(s+5)), when will the roots be real and distinct?
#quadratic equations
#discriminant expression
#interval
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A (s<-5) या (s>2) / (s<-5) or (s>2)
B (-5<s<2)
C (s=-5) या (s=2) / (s=-5) or (s=2)
D सभी वास्तविक (s) / All real (s)
Explanation opens after your attempt
Correct Answer
A. (s<-5) या (s>2) / (s<-5) or (s>2)
Step 1
Concept
For real and distinct roots, (D>0) is required. From ((s-2 )(s+5)>0), we get (s<-5) or (s>2).
Step 2
Why this answer is correct
The correct answer is A. (s<-5) या (s>2) / (s<-5) or (s>2). For real and distinct roots, (D>0) is required. From ((s-2 )(s+5)>0), we get (s<-5) or (s>2).
Step 3
Exam Tip
वास्तविक और भिन्न मूलों के लिए (D>0) चाहिए। ((s-2 )(s+5)>0) से (s<-5) या (s>2) मिलता है।
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यदि विविक्तकर (D=(z+1)2 -9) है, तो वास्तविक मूल न होने के लिए (z) किस अंतराल में होगा?
If the discriminant is (D=(z+1)2 -9), in which interval will (z) lie for no real roots?
#quadratic equations
#D negative
#interval
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A (-4<z<2)
B (z<-4) या (z>2) / (z<-4) or (z>2)
C (z=-4) या (z=2) / (z=-4) or (z=2)
D सभी वास्तविक (z) / All real (z)
Explanation opens after your attempt
Correct Answer
A. (-4<z<2)
Step 1
Concept
For no real roots, (D<0) is needed. From ((z+1)2 <9), we get (-4<z<2).
Step 2
Why this answer is correct
The correct answer is A. (-4<z<2). For no real roots, (D<0) is needed. From ((z+1)2 <9), we get (-4<z<2).
Step 3
Exam Tip
वास्तविक मूल न होने के लिए (D<0) चाहिए। ((z+1)2 <9) से (-4<z<2) मिलता है।
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समीकरण (x-2 -(a+6)x+6a=0) के समान मूलों के लिए (a) क्या होगा?
What will be (a) for equal roots of (x-2 -(a+6)x+6a=0)?
#quadratic equations
#perfect square D
#equal roots
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A (a=6)
B (a=-6)
C (a=0)
D (a=3)
Explanation opens after your attempt
Step 1
Concept
Here (D=(a+6)2 -24a=(a-6)2 ). For equal roots (D=0), so (a=6).
Step 2
Why this answer is correct
The correct answer is A. (a=6). Here (D=(a+6)2 -24a=(a-6)2 ). For equal roots (D=0), so (a=6).
Step 3
Exam Tip
यहाँ (D=(a+6)2 -24a=(a-6)2 ) है। समान मूलों के लिए (D=0), इसलिए (a=6)।
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यदि \(a\neq b\), तो (x-2 -2(a+b)x+4ab=0) के मूलों की प्रकृति क्या होगी?
If \(a\neq b\), what will be the nature of roots of (x-2 -2(a+b)x+4ab=0)?
#quadratic equations
#two parameters
#real distinct roots
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A वास्तविक और भिन्न / Real and distinct
B वास्तविक और समान / Real and equal
C वास्तविक नहीं / Not real
D सदैव अपरिमेय / Always irrational
Explanation opens after your attempt
Correct Answer
A. वास्तविक और भिन्न / Real and distinct
Step 1
Concept
Here (D=4(a-b)2 ). When \(a\neq b\), (D>0), so roots are real and distinct.
Step 2
Why this answer is correct
The correct answer is A. वास्तविक और भिन्न / Real and distinct. Here (D=4(a-b)2 ). When \(a\neq b\), (D>0), so roots are real and distinct.
Step 3
Exam Tip
यहाँ (D=4(a-b)2 ) है। \(a\neq b\) होने पर (D>0), इसलिए मूल वास्तविक और भिन्न होंगे।
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समीकरण (x-2 -(m+n)x+mn=0) के मूल समान कब होंगे?
When will the roots of (x-2 -(m+n)x+mn=0) be equal?
#quadratic equations
#equal roots
#two parameters
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A (m=n)
B (m=-n)
C (mn=0)
D (m+n=1)
Explanation opens after your attempt
Step 1
Concept
Here (D=(m+n)2 -4mn=(m-n)2 ). For (D=0), (m=n) is required.
Step 2
Why this answer is correct
The correct answer is A. (m=n). Here (D=(m+n)2 -4mn=(m-n)2 ). For (D=0), (m=n) is required.
Step 3
Exam Tip
यहाँ (D=(m+n)2 -4mn=(m-n)2 ) है। (D=0) के लिए (m=n) होना चाहिए।
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समीकरण (x-2 +2(a-b)x+(a+b)2 =0) के वास्तविक मूलों के बारे में क्या सही है?
What is correct about real roots of (x-2 +2(a-b)x+(a+b)2 =0)?
#quadratic equations
#two parameters
#real roots condition
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A वास्तविक मूल तभी होंगे जब \(ab\le0\) / Real roots only when \(ab\le0\)
B वास्तविक मूल हमेशा होंगे / Real roots always exist
C वास्तविक मूल कभी नहीं होंगे / Real roots never exist
D समान मूल तभी होंगे जब (a=b) / Equal roots only when (a=b)
Explanation opens after your attempt
Correct Answer
A. वास्तविक मूल तभी होंगे जब \(ab\le0\) / Real roots only when \(ab\le0\)
Step 1
Concept
Here (D=4(a-b)2 -4(a+b)2 =-16ab). For real roots \(D\ge0\), so \(ab\le0\).
Step 2
Why this answer is correct
The correct answer is A. वास्तविक मूल तभी होंगे जब \(ab\le0\) / Real roots only when \(ab\le0\). Here (D=4(a-b)2 -4(a+b)2 =-16ab). For real roots \(D\ge0\), so \(ab\le0\).
Step 3
Exam Tip
यहाँ (D=4(a-b)2 -4(a+b)2 =-16ab) है। वास्तविक मूलों के लिए \(D\ge0\), इसलिए \(ab\le0\)।
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यदि \(x^2-2\ell x+\ell^2-9=0\) है, तो मूलों की प्रकृति क्या है?
If \(x^2-2\ell x+\ell^2-9=0\), what is the nature of roots?
#quadratic equations
#constant discriminant
#real distinct
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A हमेशा वास्तविक और भिन्न / Always real and distinct
B हमेशा वास्तविक और समान / Always real and equal
C हमेशा वास्तविक नहीं / Always not real
D \(\ell=3\) पर ही वास्तविक / Real only when \(\ell=3\)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और भिन्न / Always real and distinct
Step 1
Concept
Here (D=\(-2\ell\)2 -4\(\ell^2-9\)=36>0). So for every real \(\ell\), roots are real and distinct.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और भिन्न / Always real and distinct. Here (D=\(-2\ell\)2 -4\(\ell^2-9\)=36>0). So for every real \(\ell\), roots are real and distinct.
Step 3
Exam Tip
यहाँ (D=\(-2\ell\)2 -4\(\ell^2-9\)=36>0) है। इसलिए हर वास्तविक \(\ell\) के लिए मूल वास्तविक और भिन्न हैं।
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समीकरण \(4x^2-4wx+w^2=0\) के मूलों की प्रकृति क्या है?
What is the nature of roots of \(4x^2-4wx+w^2=0\)?
#quadratic equations
#perfect square
#equal roots
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A हमेशा वास्तविक और समान / Always real and equal
B हमेशा वास्तविक और भिन्न / Always real and distinct
C हमेशा वास्तविक नहीं / Always not real
D केवल (w=0) पर द्विघात / Quadratic only when (w=0)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और समान / Always real and equal
Step 1
Concept
Here (D=(-4w)2 -4(4)\(w^2\)=0). Therefore roots are equal for every real (w).
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और समान / Always real and equal. Here (D=(-4w)2 -4(4)\(w^2\)=0). Therefore roots are equal for every real (w).
Step 3
Exam Tip
यहाँ (D=(-4w)2 -4(4)\(w^2\)=0) है। इसलिए हर वास्तविक (w) पर मूल समान हैं।
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समीकरण \(2x^2-4vx+2v^2+5=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?
What is the correct statement about real roots of \(2x^2-4vx+2v^2+5=0\)?
#quadratic equations
#no real roots
#constant negative D
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A वास्तविक मूल नहीं हैं / No real roots
B हमेशा वास्तविक और समान / Always real and equal
C हमेशा वास्तविक और भिन्न / Always real and distinct
D प्रकृति (v) पर निर्भर है / Nature depends on (v)
Explanation opens after your attempt
Correct Answer
A. वास्तविक मूल नहीं हैं / No real roots
Step 1
Concept
Here (D=(-4v)2 -4(2)\(2v^2+5\)=-40<0). Hence there are no real roots.
Step 2
Why this answer is correct
The correct answer is A. वास्तविक मूल नहीं हैं / No real roots. Here (D=(-4v)2 -4(2)\(2v^2+5\)=-40<0). Hence there are no real roots.
Step 3
Exam Tip
यहाँ (D=(-4v)2 -4(2)\(2v^2+5\)=-40<0) है। इसलिए वास्तविक मूल नहीं हैं।
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यदि \(x^2+2gx+g^2-6g+11=0\) के वास्तविक मूल हैं, तो (g) पर क्या शर्त है?
If \(x^2+2gx+g^2-6g+11=0\) has real roots, what condition on (g) is required?
#quadratic equations
#real roots
#fraction condition
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A \(g\ge\frac{11}{6}\)
B \(g<\frac{11}{6}\)
C (g=0)
D सभी वास्तविक (g) / All real (g)
Explanation opens after your attempt
Correct Answer
A. \(g\ge\frac{11}{6}\)
Step 1
Concept
Here (D=4g-2 -4\(g^2-6g+11\)=24g-44). From \(D\ge0\), \(g\ge\frac{11}{6}\).
Step 2
Why this answer is correct
The correct answer is A. \(g\ge\frac{11}{6}\). Here (D=4g-2 -4\(g^2-6g+11\)=24g-44). From \(D\ge0\), \(g\ge\frac{11}{6}\).
Step 3
Exam Tip
यहाँ (D=4g-2 -4\(g^2-6g+11\)=24g-44) है। \(D\ge0\) से \(g\ge\frac{11}{6}\) मिलता है।
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समीकरण \(x^2+2gx+g^2-6g+11=0\) के समान मूलों के लिए (g) क्या होगा?
What will (g) be for equal roots of \(x^2+2gx+g^2-6g+11=0\)?
#quadratic equations
#equal roots
#parameter g
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A \(g=\frac{11}{6}\)
B \(g=\frac{6}{11}\)
C (g=6)
D (g=11)
Explanation opens after your attempt
Correct Answer
A. \(g=\frac{11}{6}\)
Step 1
Concept
For equal roots, (D=0) is needed. From (24g-44=0), we get \(g=\frac{11}{6}\).
Step 2
Why this answer is correct
The correct answer is A. \(g=\frac{11}{6}\). For equal roots, (D=0) is needed. From (24g-44=0), we get \(g=\frac{11}{6}\).
Step 3
Exam Tip
समान मूलों के लिए (D=0) चाहिए। (24g-44=0) से \(g=\frac{11}{6}\) मिलता है।
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यदि \(x^2-2hx+h^2+8h=0\) के मूल वास्तविक और भिन्न हैं, तो (h) पर सही शर्त क्या है?
If \(x^2-2hx+h^2+8h=0\) has real and distinct roots, what is the correct condition on (h)?
#quadratic equations
#parameter inequality
#real distinct
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A (h<0)
B (h>0)
C (h=0)
D \(h\ge0\)
Explanation opens after your attempt
Step 1
Concept
Here (D=4h-2 -4\(h^2+8h\)=-32h). For (D>0), (h<0) is required.
Step 2
Why this answer is correct
The correct answer is A. (h<0). Here (D=4h-2 -4\(h^2+8h\)=-32h). For (D>0), (h<0) is required.
Step 3
Exam Tip
यहाँ (D=4h-2 -4\(h^2+8h\)=-32h) है। (D>0) के लिए (h<0) चाहिए।
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यदि \(x^2-2hx+h^2+8h=0\) के मूल समान हैं, तो (h) क्या होगा?
If \(x^2-2hx+h^2+8h=0\) has equal roots, what will (h) be?
#quadratic equations
#equal roots
#parameter h
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A (h=0)
B (h=8)
C (h=-8)
D (h=4)
Explanation opens after your attempt
Step 1
Concept
For equal roots, (D=0) is required. From (-32h=0), (h=0).
Step 2
Why this answer is correct
The correct answer is A. (h=0). For equal roots, (D=0) is required. From (-32h=0), (h=0).
Step 3
Exam Tip
समान मूलों के लिए (D=0) चाहिए। (-32h=0) से (h=0) मिलता है।
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समीकरण (3x-2 -2(2a+1)x+\(a^2+a+1\)=0) के वास्तविक मूलों के लिए (a) पर क्या शर्त है?
What condition on (a) is needed for real roots of (3x-2 -2(2a+1)x+\(a^2+a+1\)=0)?
#quadratic equations
#real roots
#quadratic inequality
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A \(a^2+a-2\ge0\)
B \(a^2+a-2<0\)
C \(a^2+a+2\ge0\)
D (a=0) केवल / (a=0) only
Explanation opens after your attempt
Correct Answer
A. \(a^2+a-2\ge0\)
Step 1
Concept
Here (D=4(2a+1)2 -12\(a^2+a+1\)=4\(a^2+a-2\)). For real roots, it must be (0) or more.
Step 2
Why this answer is correct
The correct answer is A. \(a^2+a-2\ge0\). Here (D=4(2a+1)2 -12\(a^2+a+1\)=4\(a^2+a-2\)). For real roots, it must be (0) or more.
Step 3
Exam Tip
यहाँ (D=4(2a+1)2 -12\(a^2+a+1\)=4\(a^2+a-2\)) है। वास्तविक मूलों के लिए यह (0) या अधिक होना चाहिए।
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समीकरण (3x-2 -2(2a+1)x+\(a^2+a+1\)=0) के वास्तविक और भिन्न मूल कब होंगे?
When will (3x-2 -2(2a+1)x+\(a^2+a+1\)=0) have real and distinct roots?
#quadratic equations
#real distinct
#interval
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A (a<-2) या (a>1) / (a<-2) or (a>1)
B (-2<a<1)
C (a=-2) या (a=1) / (a=-2) or (a=1)
D सभी वास्तविक (a) / All real (a)
Explanation opens after your attempt
Correct Answer
A. (a<-2) या (a>1) / (a<-2) or (a>1)
Step 1
Concept
For real and distinct roots, (D>0) is needed. From \(a^2+a-2>0\), we get (a<-2) or (a>1).
Step 2
Why this answer is correct
The correct answer is A. (a<-2) या (a>1) / (a<-2) or (a>1). For real and distinct roots, (D>0) is needed. From \(a^2+a-2>0\), we get (a<-2) or (a>1).
Step 3
Exam Tip
वास्तविक और भिन्न मूलों के लिए (D>0) चाहिए। \(a^2+a-2>0\) से (a<-2) या (a>1) मिलता है।
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समीकरण (3x-2 -2(2a+1)x+\(a^2+a+1\)=0) के वास्तविक मूल न होने का अंतराल कौन सा है?
Which interval gives no real roots for (3x-2 -2(2a+1)x+\(a^2+a+1\)=0)?
#quadratic equations
#no real roots
#interval
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A (-2<a<1)
B (a<-2) या (a>1) / (a<-2) or (a>1)
C (a=-2) या (a=1) / (a=-2) or (a=1)
D \(a\le -2\) या \(a\ge1\) / \(a\le -2\) or \(a\ge1\)
Explanation opens after your attempt
Correct Answer
A. (-2<a<1)
Step 1
Concept
For no real roots, (D<0) is required. From \(a^2+a-2<0\), we get (-2<a<1).
Step 2
Why this answer is correct
The correct answer is A. (-2<a<1). For no real roots, (D<0) is required. From \(a^2+a-2<0\), we get (-2<a<1).
Step 3
Exam Tip
वास्तविक मूल न होने के लिए (D<0) चाहिए। \(a^2+a-2<0\) से (-2<a<1) मिलता है।
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एक विद्यार्थी ने (D=18) देखकर परिमेय मूल लिख दिए। सही सुधार क्या है?
A student sees (D=18) and writes rational roots. What is the correct correction?
#quadratic equations
#common mistake
#irrational roots
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A मूल वास्तविक, अपरिमेय और भिन्न होंगे / The roots will be real, irrational and distinct
B मूल वास्तविक और समान होंगे / The roots will be real and equal
C वास्तविक मूल नहीं होंगे / There will be no real roots
D मूल परिमेय और समान होंगे / Roots will be rational and equal
Explanation opens after your attempt
Correct Answer
A. मूल वास्तविक, अपरिमेय और भिन्न होंगे / The roots will be real, irrational and distinct
Step 1
Concept
(18>0) but (18) is not a perfect square. Hence the roots are real, irrational and distinct.
Step 2
Why this answer is correct
The correct answer is A. मूल वास्तविक, अपरिमेय और भिन्न होंगे / The roots will be real, irrational and distinct. (18>0) but (18) is not a perfect square. Hence the roots are real, irrational and distinct.
Step 3
Exam Tip
(18>0) है पर (18) पूर्ण वर्ग नहीं है। इसलिए मूल वास्तविक, अपरिमेय और भिन्न होंगे।
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एक विद्यार्थी (D=-4) पर दो वास्तविक मूल मानता है। सही निष्कर्ष क्या है?
A student assumes two real roots when (D=-4). What is the correct conclusion?
#quadratic equations
#common mistake
#D negative
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A कोई वास्तविक मूल नहीं होगा / There will be no real root
B दो वास्तविक और भिन्न मूल होंगे / There will be two real and distinct roots
C दो वास्तविक और समान मूल होंगे / There will be two real and equal roots
D दो परिमेय मूल होंगे / There will be two rational roots
Explanation opens after your attempt
Correct Answer
A. कोई वास्तविक मूल नहीं होगा / There will be no real root
Step 1
Concept
Because (D=-4<0), real roots are not obtained. Identify a negative discriminant quickly.
Step 2
Why this answer is correct
The correct answer is A. कोई वास्तविक मूल नहीं होगा / There will be no real root. Because (D=-4<0), real roots are not obtained. Identify a negative discriminant quickly.
Step 3
Exam Tip
क्योंकि (D=-4<0) है, वास्तविक मूल नहीं मिलते। ऋणात्मक विविक्तकर को तुरंत पहचानें।
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यदि (D=(a-1)2 +5) है, तो मूलों की प्रकृति के बारे में सही कथन क्या है?
If (D=(a-1)2 +5), what is the correct statement about the nature of roots?
#quadratic equations
#positive D
#always distinct
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A हमेशा वास्तविक और भिन्न / Always real and distinct
B हमेशा वास्तविक और समान / Always real and equal
C हमेशा वास्तविक नहीं / Always not real
D प्रकृति तय नहीं हो सकती / Nature cannot be decided
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और भिन्न / Always real and distinct
Step 1
Concept
For every real (a), ((a-1)2 +5>0). Therefore the roots will always be real and distinct.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और भिन्न / Always real and distinct. For every real (a), ((a-1)2 +5>0). Therefore the roots will always be real and distinct.
Step 3
Exam Tip
किसी भी वास्तविक (a) के लिए ((a-1)2 +5>0) है। इसलिए मूल हमेशा वास्तविक और भिन्न होंगे।
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यदि (D=-(b+3)2 ) है, तो समान वास्तविक मूल कब होंगे?
If (D=-(b+3)2 ), when will the roots be real and equal?
#quadratic equations
#D zero
#negative square
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A (b=-3)
B (b=3)
C कभी नहीं / Never
D सभी (b) / All (b)
Explanation opens after your attempt
Step 1
Concept
For real and equal roots, (D=0) is needed. From (-(b+3)2 =0), we get (b=-3).
Step 2
Why this answer is correct
The correct answer is A. (b=-3). For real and equal roots, (D=0) is needed. From (-(b+3)2 =0), we get (b=-3).
Step 3
Exam Tip
समान वास्तविक मूलों के लिए (D=0) चाहिए। (-(b+3)2 =0) से (b=-3) मिलता है।
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यदि (D=-(b+3)2 ) और \(b\neq-3\), तो मूलों की प्रकृति क्या होगी?
If (D=-(b+3)2 ) and \(b\neq-3\), what will be the nature of roots?
#quadratic equations
#D negative
#no real roots
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A वास्तविक मूल नहीं / No real roots
B वास्तविक और समान / Real and equal
C वास्तविक और भिन्न / Real and distinct
D परिमेय और भिन्न / Rational and distinct
Explanation opens after your attempt
Correct Answer
A. वास्तविक मूल नहीं / No real roots
Step 1
Concept
When \(b\neq-3\), ((b+3)2 >0) and (D<0). So there will be no real roots.
Step 2
Why this answer is correct
The correct answer is A. वास्तविक मूल नहीं / No real roots. When \(b\neq-3\), ((b+3)2 >0) and (D<0). So there will be no real roots.
Step 3
Exam Tip
जब \(b\neq-3\), तब ((b+3)2 >0) और (D<0) होगा। इसलिए वास्तविक मूल नहीं होंगे।
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समीकरण (x-2 -(2r+5)x+\(r^2+5r+4\)=0) के मूलों की प्रकृति क्या है?
What is the nature of roots of (x-2 -(2r+5)x+\(r^2+5r+4\)=0)?
#quadratic equations
#constant D
#rational roots
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A हमेशा वास्तविक, परिमेय और भिन्न / Always real, rational and distinct
B हमेशा वास्तविक और समान / Always real and equal
C हमेशा वास्तविक नहीं / Always not real
D प्रकृति (r) पर निर्भर है / Nature depends on (r)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक, परिमेय और भिन्न / Always real, rational and distinct
Step 1
Concept
Here (D=(2r+5)2 -4\(r^2+5r+4\)=9). Since (9>0) and is a perfect square, roots are rational and distinct.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक, परिमेय और भिन्न / Always real, rational and distinct. Here (D=(2r+5)2 -4\(r^2+5r+4\)=9). Since (9>0) and is a perfect square, roots are rational and distinct.
Step 3
Exam Tip
यहाँ (D=(2r+5)2 -4\(r^2+5r+4\)=9) है। (9>0) और पूर्ण वर्ग है, इसलिए मूल परिमेय और भिन्न हैं।
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समीकरण (x-2 -(2r+5)x+\(r^2+5r+7\)=0) के वास्तविक मूलों के बारे में क्या सही है?
What is correct about real roots of (x-2 -(2r+5)x+\(r^2+5r+7\)=0)?
#quadratic equations
#constant negative D
#no real roots
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A वास्तविक मूल नहीं हैं / No real roots
B हमेशा वास्तविक और भिन्न / Always real and distinct
C हमेशा वास्तविक और समान / Always real and equal
D केवल (r=0) पर वास्तविक / Real only when (r=0)
Explanation opens after your attempt
Correct Answer
A. वास्तविक मूल नहीं हैं / No real roots
Step 1
Concept
Here (D=(2r+5)2 -4\(r^2+5r+7\)=-3<0). Therefore there are no real roots.
Step 2
Why this answer is correct
The correct answer is A. वास्तविक मूल नहीं हैं / No real roots. Here (D=(2r+5)2 -4\(r^2+5r+7\)=-3<0). Therefore there are no real roots.
Step 3
Exam Tip
यहाँ (D=(2r+5)2 -4\(r^2+5r+7\)=-3<0) है। इसलिए वास्तविक मूल नहीं हैं।
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यदि (x-2 -2(k-3)x+k-2 -6k+10=0) है, तो मूलों की प्रकृति क्या है?
If (x-2 -2(k-3)x+k-2 -6k+10=0), what is the nature of roots?
#quadratic equations
#no real roots
#parameter k
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A वास्तविक मूल नहीं / No real roots
B हमेशा वास्तविक और समान / Always real and equal
C हमेशा वास्तविक और भिन्न / Always real and distinct
D (k=3) पर दो वास्तविक मूल / Two real roots when (k=3)
Explanation opens after your attempt
Correct Answer
A. वास्तविक मूल नहीं / No real roots
Step 1
Concept
Here (D=4(k-3)2 -4\(k^2-6k+10\)=-4<0). So there are no real roots for any (k).
Step 2
Why this answer is correct
The correct answer is A. वास्तविक मूल नहीं / No real roots. Here (D=4(k-3)2 -4\(k^2-6k+10\)=-4<0). So there are no real roots for any (k).
Step 3
Exam Tip
यहाँ (D=4(k-3)2 -4\(k^2-6k+10\)=-4<0) है। इसलिए किसी भी (k) पर वास्तविक मूल नहीं हैं।
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यदि (x-2 -2(k-3)x+k-2 -6k+8=0) है, तो मूलों की प्रकृति क्या है?
If (x-2 -2(k-3)x+k-2 -6k+8=0), what is the nature of roots?
#quadratic equations
#always real distinct
#constant D
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A हमेशा वास्तविक और भिन्न / Always real and distinct
B हमेशा वास्तविक और समान / Always real and equal
C वास्तविक मूल नहीं / No real roots
D प्रकृति (k) पर निर्भर / Nature depends on (k)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और भिन्न / Always real and distinct
Step 1
Concept
Here (D=4(k-3)2 -4\(k^2-6k+8\)=4>0). Therefore roots are always real and distinct.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और भिन्न / Always real and distinct. Here (D=4(k-3)2 -4\(k^2-6k+8\)=4>0). Therefore roots are always real and distinct.
Step 3
Exam Tip
यहाँ (D=4(k-3)2 -4\(k^2-6k+8\)=4>0) है। इसलिए मूल हमेशा वास्तविक और भिन्न हैं।
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यदि (x-2 -2(k-3)x+k-2 -6k+9=0) है, तो मूलों की प्रकृति क्या होगी?
If (x-2 -2(k-3)x+k-2 -6k+9=0), what will be the nature of roots?
#quadratic equations
#equal roots
#perfect square trinomial
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? Hint Small clue
A हमेशा वास्तविक और समान / Always real and equal
B हमेशा वास्तविक और भिन्न / Always real and distinct
C वास्तविक मूल नहीं / No real roots
D केवल (k=3) पर समान / Equal only when (k=3)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और समान / Always real and equal
Step 1
Concept
Here (D=4(k-3)2 -4(k-3)2 =0). Therefore roots are always real and equal.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और समान / Always real and equal. Here (D=4(k-3)2 -4(k-3)2 =0). Therefore roots are always real and equal.
Step 3
Exam Tip
यहाँ (D=4(k-3)2 -4(k-3)2 =0) है। इसलिए मूल हमेशा वास्तविक और समान हैं।
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समीकरण (x-2 +2(n+2)x+n-2 +4n+1=0) के मूलों की प्रकृति क्या है?
What is the nature of roots of (x-2 +2(n+2)x+n-2 +4n+1=0)?
#quadratic equations
#constant positive D
#real distinct
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+10 Time+ 10 sec extra
? Hint Small clue
A हमेशा वास्तविक और भिन्न / Always real and distinct
B हमेशा वास्तविक और समान / Always real and equal
C हमेशा वास्तविक नहीं / Always not real
D केवल (n=0) पर वास्तविक / Real only when (n=0)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और भिन्न / Always real and distinct
Step 1
Concept
Here (D=4(n+2)2 -4\(n^2+4n+1\)=12>0). Hence roots are always real and distinct.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और भिन्न / Always real and distinct. Here (D=4(n+2)2 -4\(n^2+4n+1\)=12>0). Hence roots are always real and distinct.
Step 3
Exam Tip
यहाँ (D=4(n+2)2 -4\(n^2+4n+1\)=12>0) है। इसलिए मूल हमेशा वास्तविक और भिन्न हैं।
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समीकरण (x-2 +2(n+2)x+n-2 +4n+8=0) के मूलों के बारे में सही कथन क्या है?
What is the correct statement about roots of (x-2 +2(n+2)x+n-2 +4n+8=0)?
#quadratic equations
#no real roots
#constant discriminant
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A वास्तविक मूल नहीं हैं / No real roots
B हमेशा वास्तविक और समान / Always real and equal
C हमेशा वास्तविक और भिन्न / Always real and distinct
D प्रकृति (n) पर निर्भर है / Nature depends on (n)
Explanation opens after your attempt
Correct Answer
A. वास्तविक मूल नहीं हैं / No real roots
Step 1
Concept
Here (D=4(n+2)2 -4\(n^2+4n+8\)=-16<0). Therefore real roots do not exist.
Step 2
Why this answer is correct
The correct answer is A. वास्तविक मूल नहीं हैं / No real roots. Here (D=4(n+2)2 -4\(n^2+4n+8\)=-16<0). Therefore real roots do not exist.
Step 3
Exam Tip
यहाँ (D=4(n+2)2 -4\(n^2+4n+8\)=-16<0) है। इसलिए वास्तविक मूल नहीं हैं।
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समीकरण (\(\lambda+1\)x-2 -2\(\lambda-2\)x+\(\lambda+1\)=0) के वास्तविक और समान मूलों के लिए \(\lambda\) क्या होगा?
What will \(\lambda\) be for real and equal roots of (\(\lambda+1\)x-2 -2\(\lambda-2\)x+\(\lambda+1\)=0)?
#quadratic equations
#lambda
#equal roots
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A \(\lambda=\frac{1}{4}\)
B \(\lambda=-1\)
C \(\lambda=2\)
D \(\lambda=-\frac{1}{4}\)
Explanation opens after your attempt
Correct Answer
A. \(\lambda=\frac{1}{4}\)
Step 1
Concept
Here (D=4\(\lambda-2\)2 -4\(\lambda+1\)2 =12\(1-2\lambda\)). From (D=0), \(\lambda=\frac{1}{2}\).
Step 2
Why this answer is correct
The correct answer is A. \(\lambda=\frac{1}{4}\). Here (D=4\(\lambda-2\)2 -4\(\lambda+1\)2 =12\(1-2\lambda\)). From (D=0), \(\lambda=\frac{1}{2}\).
Step 3
Exam Tip
यहाँ (D=4\(\lambda-2\)2 -4\(\lambda+1\)2 =12\(1-2\lambda\)) है। (D=0) से \(\lambda=\frac{1}{2}\) मिलता है।
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यदि (2x-2 -2\(\mu+3\)x+\mu-2 +6\mu+5=0) के मूल वास्तविक और भिन्न हैं, तो \(\mu\) पर क्या शर्त है?
If (2x-2 -2\(\mu+3\)x+\mu-2 +6\mu+5=0) has real and distinct roots, what is the condition on \(\mu\)?
#quadratic equations
#parameter mu
#critical check
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A सभी वास्तविक \(\mu\) / All real \(\mu\)
B कोई वास्तविक \(\mu\) नहीं / No real \(\mu\)
C \(\mu>0\)
D \(\mu<0\)
Explanation opens after your attempt
Correct Answer
A. सभी वास्तविक \(\mu\) / All real \(\mu\)
Step 1
Concept
Here (D=4\(\mu+3\)2 -8\(\mu^2+6\mu+5\)=-4\(\mu^2+6\mu+1\)). It is not always positive, so all \(\mu\) is not correct.
Step 2
Why this answer is correct
The correct answer is A. सभी वास्तविक \(\mu\) / All real \(\mu\). Here (D=4\(\mu+3\)2 -8\(\mu^2+6\mu+5\)=-4\(\mu^2+6\mu+1\)). It is not always positive, so all \(\mu\) is not correct.
Step 3
Exam Tip
यहाँ (D=4\(\mu+3\)2 -8\(\mu^2+6\mu+5\)=-4\(\mu^2+6\mu+1\)) है। यह हमेशा धनात्मक नहीं है, इसलिए सभी \(\mu\) सही नहीं है।
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यदि (x-2 -2(a+4)x+a-2 +8a+20=0) है, तो वास्तविक मूलों की संख्या क्या होगी?
If (x-2 -2(a+4)x+a-2 +8a+20=0), what will be the number of real roots?
#quadratic equations
#root count
#no real roots
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A (0)
B (1)
C (2)
D (4)
Explanation opens after your attempt
Step 1
Concept
Here (D=4(a+4)2 -4\(a^2+8a+20\)=-16<0). So the number of real roots is (0).
Step 2
Why this answer is correct
The correct answer is A. (0). Here (D=4(a+4)2 -4\(a^2+8a+20\)=-16<0). So the number of real roots is (0).
Step 3
Exam Tip
यहाँ (D=4(a+4)2 -4\(a^2+8a+20\)=-16<0) है। इसलिए वास्तविक मूलों की संख्या (0) है।
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यदि (x-2 -2(a+4)x+a-2 +8a+15=0) है, तो मूलों की प्रकृति क्या होगी?
If (x-2 -2(a+4)x+a-2 +8a+15=0), what will be the nature of roots?
#quadratic equations
#rational distinct roots
#constant D
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? Hint Small clue
A हमेशा वास्तविक, परिमेय और भिन्न / Always real, rational and distinct
B हमेशा वास्तविक और समान / Always real and equal
C हमेशा वास्तविक नहीं / Always not real
D प्रकृति (a) पर निर्भर है / Nature depends on (a)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक, परिमेय और भिन्न / Always real, rational and distinct
Step 1
Concept
Here (D=4(a+4)2 -4\(a^2+8a+15\)=4). Therefore roots are always real, rational and distinct.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक, परिमेय और भिन्न / Always real, rational and distinct. Here (D=4(a+4)2 -4\(a^2+8a+15\)=4). Therefore roots are always real, rational and distinct.
Step 3
Exam Tip
यहाँ (D=4(a+4)2 -4\(a^2+8a+15\)=4) है। इसलिए मूल हमेशा वास्तविक, परिमेय और भिन्न हैं।
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यदि (x-2 -2(a+4)x+a-2 +8a+16=0) है, तो मूलों की प्रकृति क्या होगी?
If (x-2 -2(a+4)x+a-2 +8a+16=0), what will be the nature of roots?
#quadratic equations
#equal roots
#constant D
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A हमेशा वास्तविक और समान / Always real and equal
B हमेशा वास्तविक और भिन्न / Always real and distinct
C हमेशा वास्तविक नहीं / Always not real
D केवल (a=-4) पर समान / Equal only when (a=-4)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और समान / Always real and equal
Step 1
Concept
Here (D=4(a+4)2 -4(a+4)2 =0). Therefore roots are always real and equal.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और समान / Always real and equal. Here (D=4(a+4)2 -4(a+4)2 =0). Therefore roots are always real and equal.
Step 3
Exam Tip
यहाँ (D=4(a+4)2 -4(a+4)2 =0) है। इसलिए मूल हमेशा वास्तविक और समान हैं।
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समीकरण (x-2 -2(a-5)x+a-2 -10a+21=0) के मूलों की प्रकृति क्या है?
What is the nature of roots of (x-2 -2(a-5)x+a-2 -10a+21=0)?
#quadratic equations
#constant discriminant
#real distinct roots
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A हमेशा वास्तविक और भिन्न / Always real and distinct
B हमेशा वास्तविक और समान / Always real and equal
C वास्तविक मूल नहीं / No real roots
D प्रकृति (a) पर निर्भर है / Nature depends on (a)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और भिन्न / Always real and distinct
Step 1
Concept
Here (D=4(a-5)2 -4\(a^2-10a+21\)=16>0). Therefore the roots are real and distinct for every real (a).
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और भिन्न / Always real and distinct. Here (D=4(a-5)2 -4\(a^2-10a+21\)=16>0). Therefore the roots are real and distinct for every real (a).
Step 3
Exam Tip
यहाँ (D=4(a-5)2 -4\(a^2-10a+21\)=16>0) है। इसलिए हर वास्तविक (a) के लिए मूल वास्तविक और भिन्न हैं।
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समीकरण (x-2 +2(k+1)x+k-2 +6k+9=0) के वास्तविक मूल न होने के लिए (k) पर क्या शर्त है?
What condition on (k) is needed for (x-2 +2(k+1)x+k-2 +6k+9=0) to have no real roots?
#quadratic equations
#no real roots
#parameter condition
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A (k>-2)
B (k<-2)
C (k=-2)
D सभी वास्तविक (k) / All real (k)
Explanation opens after your attempt
Step 1
Concept
For no real roots, (D<0) is needed. Here (D=-16(k+2)), so (k>-2).
Step 2
Why this answer is correct
The correct answer is A. (k>-2). For no real roots, (D<0) is needed. Here (D=-16(k+2)), so (k>-2).
Step 3
Exam Tip
वास्तविक मूल न होने के लिए (D<0) चाहिए। यहाँ (D=-16(k+2)), इसलिए (k>-2)।
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समीकरण ((p+4)x-2 -2(p+1)x+(p-2)=0) के मूलों के बारे में सही कथन क्या है, यदि \(p\neq-4\)?
What is the correct statement about the roots of ((p+4)x-2 -2(p+1)x+(p-2)=0), if \(p\neq-4\)?
#quadratic equations
#quadratic condition
#real distinct roots
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A हमेशा वास्तविक और भिन्न / Always real and distinct
B हमेशा वास्तविक और समान / Always real and equal
C वास्तविक मूल नहीं / No real roots
D केवल (p=2) पर वास्तविक / Real only when (p=2)
Explanation opens after your attempt
Correct Answer
A. हमेशा वास्तविक और भिन्न / Always real and distinct
Step 1
Concept
Here (D=4(p+1)2 -4(p+4)(p-2)=36>0). Since \(p\neq-4\), the equation remains quadratic and roots are distinct.
Step 2
Why this answer is correct
The correct answer is A. हमेशा वास्तविक और भिन्न / Always real and distinct. Here (D=4(p+1)2 -4(p+4)(p-2)=36>0). Since \(p\neq-4\), the equation remains quadratic and roots are distinct.
Step 3
Exam Tip
यहाँ (D=4(p+1)2 -4(p+4)(p-2)=36>0) है। \(p\neq-4\) से समीकरण द्विघात रहता है और मूल भिन्न होते हैं।
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