B. कटान नहीं बदलते/The intersections do not change
Step 1
Concept
A non-zero constant multiplier does not change zeroes. Tip: zeroes come from factors that make the value zero.
Step 2
Why this answer is correct
The correct answer is B. कटान नहीं बदलते / The intersections do not change. A non-zero constant multiplier does not change zeroes. Tip: zeroes come from factors that make the value zero.
Step 3
Exam Tip
अशून्य स्थिर गुणक शून्यकों को नहीं बदलता। टिप: शून्यक केवल शून्य बनाने वाले कारकों से मिलते हैं।
\(2^2\) is already fine, \(3^3\) needs one (3), and \(5^1\) needs one (5).
Step 3
Exam Tip
Make only the odd exponents even. चरण 1: पूर्ण वर्ग में सभी घातें सम होनी चाहिए। चरण 2: \(2^2\) ठीक है, \(3^3\) को \(3^4\) बनाने के लिए (3) और \(5^1\) को \(5^2\) बनाने के लिए (5) चाहिए। चरण 3: केवल विषम घातों को एक-एक बढ़ाकर सम बनाएं।
A. यह (x)-अक्ष के समांतर है और उसे नहीं काटता/It is parallel to the (x)-axis and does not cut it
Step 1
Concept
The value (p(x)=5) is never (0) so it has no zero. Tip: a non-zero constant polynomial has no zero.
Step 2
Why this answer is correct
The correct answer is A. यह (x)-अक्ष के समांतर है और उसे नहीं काटता / It is parallel to the (x)-axis and does not cut it. The value (p(x)=5) is never (0) so it has no zero. Tip: a non-zero constant polynomial has no zero.
Step 3
Exam Tip
(p(x)=5) कभी (0) नहीं होता इसलिए शून्यक नहीं है। टिप: अशून्य स्थिर बहुपद का शून्यक नहीं होता।
The graph of (p(x)=5) is a line parallel to the (x)-axis and does not cut it. Hence it has no zero.
Step 2
Why this answer is correct
The correct answer is A. कोई शून्यक नहीं / No zero. The graph of (p(x)=5) is a line parallel to the (x)-axis and does not cut it. Hence it has no zero.
Step 3
Exam Tip
(p(x)=5) का ग्राफ (x)-अक्ष के समानांतर रेखा है जो (x)-अक्ष को नहीं काटती। इसलिए इसका कोई शून्यक नहीं है।
A. क्योंकि (y) हमेशा (-3) रहता है/Because (y) always remains (-3)
Step 1
Concept
For (p(x)=-3), the (y)-value is never (0). So the graph does not cut the (x)-axis and has no zero.
Step 2
Why this answer is correct
The correct answer is A. क्योंकि (y) हमेशा (-3) रहता है / Because (y) always remains (-3). For (p(x)=-3), the (y)-value is never (0). So the graph does not cut the (x)-axis and has no zero.
Step 3
Exam Tip
(p(x)=-3) का (y)-मान कभी (0) नहीं होता। इसलिए ग्राफ (x)-अक्ष को नहीं काटता और कोई शून्यक नहीं है।
The outside (-2) does not change the zero and ((x+5)2=0) gives (x=-5). Tip: a squared factor can show touching.
Step 2
Why this answer is correct
The correct answer is B. (x=-5) पर / At (x=-5). The outside (-2) does not change the zero and ((x+5)2=0) gives (x=-5). Tip: a squared factor can show touching.
Step 3
Exam Tip
बाहरी (-2) शून्यक नहीं बदलता और ((x+5)2=0) से (x=-5) है। टिप: वर्ग कारक स्पर्श दिखा सकता है।
A. जो (x)-अक्ष को ((1,0)) और ((-6,0)) पर काटे/One that cuts the (x)-axis at ((1,0)) and ((-6,0))
Step 1
Concept
If the zeroes are (1) and (-6), the graph cuts the (x)-axis at those (x)-values. So the points are ((1,0)) and ((-6,0)).
Step 2
Why this answer is correct
The correct answer is A. जो (x)-अक्ष को ((1,0)) और ((-6,0)) पर काटे / One that cuts the (x)-axis at ((1,0)) and ((-6,0)). If the zeroes are (1) and (-6), the graph cuts the (x)-axis at those (x)-values. So the points are ((1,0)) and ((-6,0)).
Step 3
Exam Tip
शून्यक (1) और (-6) होने पर ग्राफ (x)-अक्ष को इन्हीं (x)-मानों पर काटेगा। इसलिए बिंदु ((1,0)) और ((-6,0)) होंगे।
B. यह शून्यकों को नहीं बदलता/It does not change the zeroes
Step 1
Concept
A non-zero constant multiplier does not change the zeroes. Tip: find zeroes from the factors.
Step 2
Why this answer is correct
The correct answer is B. यह शून्यकों को नहीं बदलता / It does not change the zeroes. A non-zero constant multiplier does not change the zeroes. Tip: find zeroes from the factors.
Step 3
Exam Tip
अशून्य स्थिर गुणक शून्यकों को नहीं बदलता। टिप: शून्यक कारकों से निकालें।
For a constant polynomial, both (r+4=0) and (r-1=0) are needed, which is impossible together. All variable terms must vanish.
Step 2
Why this answer is correct
The correct answer is D. ऐसा कोई मान नहीं / No such value. For a constant polynomial, both (r+4=0) and (r-1=0) are needed, which is impossible together. All variable terms must vanish.
Step 3
Exam Tip
अचर बहुपद के लिए (r+4=0) और (r-1=0) दोनों चाहिए, जो साथ संभव नहीं हैं। सभी चर वाले पद हटने चाहिए।
A constant polynomial has no variable term, so (7) is a constant polynomial. A non-zero constant polynomial has degree (0).
Step 2
Why this answer is correct
The correct answer is A. (7). A constant polynomial has no variable term, so (7) is a constant polynomial. A non-zero constant polynomial has degree (0).
Step 3
Exam Tip
स्थिर बहुपद में चर का पद नहीं होता, इसलिए (7) स्थिर बहुपद है। अशून्य स्थिर बहुपद की घात (0) होती है।
For a constant polynomial, both (n-2=0) and (n+1=0) are needed, which is impossible together. All variable terms must vanish.
Step 2
Why this answer is correct
The correct answer is D. ऐसा कोई मान नहीं / No such value. For a constant polynomial, both (n-2=0) and (n+1=0) are needed, which is impossible together. All variable terms must vanish.
Step 3
Exam Tip
अचर बहुपद के लिए (n-2=0) और (n+1=0) दोनों चाहिए, जो साथ संभव नहीं हैं। सभी चर वाले पद हटने चाहिए।
For a constant polynomial, both (m+1=0) and (m-2=0) are needed, which is impossible together. All variable terms must vanish.
Step 2
Why this answer is correct
The correct answer is C. ऐसा कोई मान नहीं / No such value. For a constant polynomial, both (m+1=0) and (m-2=0) are needed, which is impossible together. All variable terms must vanish.
Step 3
Exam Tip
अचर बहुपद के लिए (m+1=0) और (m-2=0) दोनों चाहिए, जो साथ संभव नहीं हैं। सभी चर वाले पद हटने चाहिए।
The coefficient of \(x^2\) is (-7) and the constant term is (-11), so the sum is (-18). Do not forget to add with signs.
Step 2
Why this answer is correct
The correct answer is A. (-18). The coefficient of \(x^2\) is (-7) and the constant term is (-11), so the sum is (-18). Do not forget to add with signs.
Step 3
Exam Tip
\(x^2\) का गुणांक (-7) और अचर पद (-11) है, इसलिए योग (-18) है। संकेत सहित जोड़ना न भूलें।
A. घात (3), नियत पद (-4)/Degree (3), constant term (-4)
Step 1
Concept
The highest power is (3) and the term without (x) is (-4). So the correct pair is degree (3), constant term (-4).
Step 2
Why this answer is correct
The correct answer is A. घात (3), नियत पद (-4) / Degree (3), constant term (-4). The highest power is (3) and the term without (x) is (-4). So the correct pair is degree (3), constant term (-4).
Step 3
Exam Tip
सबसे बड़ी घात (3) है और बिना (x) वाला पद (-4) है। इसलिए सही जोड़ी घात (3), नियत पद (-4) है।
In \(2x^2+7x=0\), the \(x^2\) term is present and the constant term is absent. An equation can be quadratic even without a constant term.
Step 2
Why this answer is correct
The correct answer is A. \(2x^2+7x=0\). In \(2x^2+7x=0\), the \(x^2\) term is present and the constant term is absent. An equation can be quadratic even without a constant term.
Step 3
Exam Tip
\(2x^2+7x=0\) में \(x^2\) पद है और स्थिर पद अनुपस्थित है। स्थिर पद न होने पर भी समीकरण द्विघात हो सकता है।
A. शून्यकों का गुणनफल \(-3\sqrt{2}\) है/The product of zeroes is \(-3\sqrt{2}\)
Step 1
Concept
In a monic quadratic, the constant term is the product of zeroes. Here \(\alpha\beta=-3\sqrt{2}\).
Step 2
Why this answer is correct
The correct answer is A. शून्यकों का गुणनफल \(-3\sqrt{2}\) है / The product of zeroes is \(-3\sqrt{2}\). In a monic quadratic, the constant term is the product of zeroes. Here \(\alpha\beta=-3\sqrt{2}\).
Step 3
Exam Tip
एकक द्विघात में स्थिर पद शून्यकों का गुणनफल होता है। यहाँ \(\alpha\beta=-3\sqrt{2}\) है।
In a monic polynomial, the constant term is the product of zeroes. Here the product is (\(a+\sqrt{b}\)\(a-\sqrt{b}\)=a-2-b).
Step 2
Why this answer is correct
The correct answer is A. \(a^2-b\). In a monic polynomial, the constant term is the product of zeroes. Here the product is (\(a+\sqrt{b}\)\(a-\sqrt{b}\)=a-2-b).
Step 3
Exam Tip
एकक बहुपद में स्थिर पद शून्यकों का गुणनफल होता है। यहाँ गुणनफल (\(a+\sqrt{b}\)\(a-\sqrt{b}\)=a-2-b) है।
C. यह (x)-अक्ष के समांतर है और उसे नहीं काटता/It is parallel to the (x)-axis and does not cut it
Step 1
Concept
(p(x)=5) is never (0). Tip: a non-zero constant polynomial has no real zero.
Step 2
Why this answer is correct
The correct answer is C. यह (x)-अक्ष के समांतर है और उसे नहीं काटता / It is parallel to the (x)-axis and does not cut it. (p(x)=5) is never (0). Tip: a non-zero constant polynomial has no real zero.
Step 3
Exam Tip
(p(x)=5) कभी (0) नहीं होता। टिप: अशून्य स्थिर बहुपद का वास्तविक शून्यक नहीं होता।
A. यह (x)-अक्ष के समानांतर होगा और उसे नहीं काटेगा/It is parallel to the (x)-axis and does not cut it
Step 1
Concept
In (p(x)=4), (y) is always (4) and never (0). Hence it has no zero.
Step 2
Why this answer is correct
The correct answer is A. यह (x)-अक्ष के समानांतर होगा और उसे नहीं काटेगा / It is parallel to the (x)-axis and does not cut it. In (p(x)=4), (y) is always (4) and never (0). Hence it has no zero.
Step 3
Exam Tip
(p(x)=4) में (y) हमेशा (4) है और कभी (0) नहीं होता। इसलिए इसका कोई शून्यक नहीं है।
C. एक बिंदु पर कटती रेखाएं/Lines intersecting at one point
Step 1
Concept
Here \(5/12 \ne 17/41\), so the lines will intersect at one point. This gives one unique solution.
Step 2
Why this answer is correct
The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(5/12 \ne 17/41\), so the lines will intersect at one point. This gives one unique solution.
Step 3
Exam Tip
यहां \(5/12 \ne 17/41\), इसलिए रेखाएं एक बिंदु पर कटेंगी। इससे एक अद्वितीय हल मिलेगा।
C. रेखाएं अलग समानांतर हैं/Lines are distinct parallel
Step 1
Concept
Here (22/2=33/3) but (99/12) is different. Therefore, the graph will show distinct parallel lines.
Step 2
Why this answer is correct
The correct answer is C. रेखाएं अलग समानांतर हैं / Lines are distinct parallel. Here (22/2=33/3) but (99/12) is different. Therefore, the graph will show distinct parallel lines.
Step 3
Exam Tip
यहां (22/2=33/3) लेकिन (99/12) अलग है। इसलिए ग्राफ में अलग समानांतर रेखाएं बनेंगी।
C. एक बिंदु पर कटती रेखाएं/Lines intersecting at one point
Step 1
Concept
Here \(4/9 \ne 15/31\) so the lines will intersect at one point. This gives one unique solution.
Step 2
Why this answer is correct
The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(4/9 \ne 15/31\) so the lines will intersect at one point. This gives one unique solution.
Step 3
Exam Tip
यहां \(4/9 \ne 15/31\) इसलिए रेखाएं एक बिंदु पर कटेंगी। इससे एक अद्वितीय हल मिलेगा।
C. रेखाएं अलग समानांतर हैं/Lines are distinct parallel
Step 1
Concept
Here (20/2=30/3) but (90/11) is different. Therefore, the graph will show distinct parallel lines.
Step 2
Why this answer is correct
The correct answer is C. रेखाएं अलग समानांतर हैं / Lines are distinct parallel. Here (20/2=30/3) but (90/11) is different. Therefore, the graph will show distinct parallel lines.
Step 3
Exam Tip
यहां (20/2=30/3) लेकिन (90/11) अलग है। इसलिए ग्राफ में अलग समानांतर रेखाएं बनेंगी।
C. एक बिंदु पर कटती रेखाएं/Lines intersecting at one point
Step 1
Concept
Here \(3/8 \ne 13/29\), so the lines will intersect at one point. This gives one unique solution.
Step 2
Why this answer is correct
The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(3/8 \ne 13/29\), so the lines will intersect at one point. This gives one unique solution.
Step 3
Exam Tip
यहां \(3/8 \ne 13/29\), इसलिए रेखाएं एक बिंदु पर कटेंगी। इससे एक अद्वितीय हल मिलेगा।
C. रेखाएं अलग समानांतर हैं/Lines are distinct parallel
Step 1
Concept
Here (18/3=24/4) but (54/11) is different. Therefore, the graph will show distinct parallel lines.
Step 2
Why this answer is correct
The correct answer is C. रेखाएं अलग समानांतर हैं / Lines are distinct parallel. Here (18/3=24/4) but (54/11) is different. Therefore, the graph will show distinct parallel lines.
Step 3
Exam Tip
यहां (18/3=24/4) लेकिन (54/11) अलग है। इसलिए ग्राफ में अलग समानांतर रेखाएं बनेंगी।
The second equation is (3) times the first. Therefore, both equations show the same line in the graph.
Step 2
Why this answer is correct
The correct answer is B. एक ही रेखा / Same line. The second equation is (3) times the first. Therefore, both equations show the same line in the graph.
Step 3
Exam Tip
दूसरा समीकरण पहले का (3) गुना है। इसलिए दोनों समीकरण ग्राफ में एक ही रेखा दिखाते हैं।
C. एक बिंदु पर कटती रेखाएं/Lines intersecting at one point
Step 1
Concept
Here \(2/5 \ne 11/19\), so the lines will intersect at one point. This gives one unique solution.
Step 2
Why this answer is correct
The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(2/5 \ne 11/19\), so the lines will intersect at one point. This gives one unique solution.
Step 3
Exam Tip
यहां \(2/5 \ne 11/19\), इसलिए रेखाएं एक बिंदु पर कटेंगी। इससे एक अद्वितीय हल मिलेगा।
C. रेखाएं अलग समानांतर हैं/Lines are distinct parallel
Step 1
Concept
Here (14/2=21/3) but (49/8) is different. Therefore, the graph will show distinct parallel lines.
Step 2
Why this answer is correct
The correct answer is C. रेखाएं अलग समानांतर हैं / Lines are distinct parallel. Here (14/2=21/3) but (49/8) is different. Therefore, the graph will show distinct parallel lines.
Step 3
Exam Tip
यहां (14/2=21/3) लेकिन (49/8) अलग है। इसलिए ग्राफ में अलग समानांतर रेखाएं बनेंगी।
If the first two ratios are equal and the third differs, the lines are parallel and distinct. Therefore, there is no common solution.
Step 2
Why this answer is correct
The correct answer is C. अलग समानांतर रेखाएं / Distinct parallel lines. If the first two ratios are equal and the third differs, the lines are parallel and distinct. Therefore, there is no common solution.
Step 3
Exam Tip
पहले दो अनुपात बराबर और तीसरा अलग हो तो रेखाएं समानांतर और अलग होती हैं। इसलिए कोई सामान्य हल नहीं होता।
C. एक बिंदु पर कटती रेखाएं/Lines intersecting at one point
Step 1
Concept
Here \(2/5 \ne 11/19\) so the lines will intersect at one point. This gives one unique solution.
Step 2
Why this answer is correct
The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(2/5 \ne 11/19\) so the lines will intersect at one point. This gives one unique solution.
Step 3
Exam Tip
यहां \(2/5 \ne 11/19\) इसलिए रेखाएं एक बिंदु पर कटेंगी। इससे एक अद्वितीय हल मिलेगा।
C. रेखाएं अलग समानांतर हैं/Lines are distinct parallel
Step 1
Concept
Here (14/2=21/3) but (49/8) is different. Therefore the graph will show distinct parallel lines.
Step 2
Why this answer is correct
The correct answer is C. रेखाएं अलग समानांतर हैं / Lines are distinct parallel. Here (14/2=21/3) but (49/8) is different. Therefore the graph will show distinct parallel lines.
Step 3
Exam Tip
यहां (14/2=21/3) लेकिन (49/8) अलग है। इसलिए ग्राफ में अलग समानांतर रेखाएं बनेंगी।
If the first two ratios are equal and the third differs the lines are parallel and distinct. Therefore no common solution is obtained.
Step 2
Why this answer is correct
The correct answer is C. अलग समानांतर रेखाएं / Distinct parallel lines. If the first two ratios are equal and the third differs the lines are parallel and distinct. Therefore no common solution is obtained.
Step 3
Exam Tip
पहले दो अनुपात बराबर और तीसरा अलग हो तो रेखाएं समानांतर और अलग होती हैं। इसलिए कोई सामान्य हल नहीं मिलता।
C. एक बिंदु पर कटती रेखाएं/Lines intersecting at one point
Step 1
Concept
Here \(3/7 \ne 8/13\), so the lines will intersect at one point. This gives one unique solution.
Step 2
Why this answer is correct
The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(3/7 \ne 8/13\), so the lines will intersect at one point. This gives one unique solution.
Step 3
Exam Tip
यहां \(3/7 \ne 8/13\), इसलिए रेखाएं एक बिंदु पर कटेंगी। इससे एक अद्वितीय हल मिलेगा।
C. रेखाएं अलग समानांतर हैं/Lines are distinct parallel
Step 1
Concept
Here (10/2=15/3) but (35/9) is different. Therefore, the graph will show distinct parallel lines.
Step 2
Why this answer is correct
The correct answer is C. रेखाएं अलग समानांतर हैं / Lines are distinct parallel. Here (10/2=15/3) but (35/9) is different. Therefore, the graph will show distinct parallel lines.
Step 3
Exam Tip
यहां (10/2=15/3) लेकिन (35/9) अलग है। इसलिए ग्राफ में अलग समानांतर रेखाएं बनेंगी।
Equal first two ratios give the same slope and a different third ratio keeps the lines separate. Hence, they are distinct parallel.
Step 2
Why this answer is correct
The correct answer is C. अलग समानांतर / Distinct parallel. Equal first two ratios give the same slope and a different third ratio keeps the lines separate. Hence, they are distinct parallel.
Step 3
Exam Tip
पहले दो अनुपात बराबर होने से ढाल समान होती है और तीसरा अलग होने से रेखाएं अलग रहती हैं। इसलिए वे अलग समानांतर होती हैं।
C. एक बिंदु पर कटती रेखाएं/Lines intersecting at one point
Step 1
Concept
Here \(2/5 \ne 9/11\), so the lines will intersect at one point. This gives one unique solution.
Step 2
Why this answer is correct
The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(2/5 \ne 9/11\), so the lines will intersect at one point. This gives one unique solution.
Step 3
Exam Tip
यहां \(2/5 \ne 9/11\), इसलिए रेखाएं एक बिंदु पर कटेंगी। इससे एक अद्वितीय हल मिलेगा।
C. रेखाएं अलग समानांतर हैं/Lines are distinct parallel
Step 1
Concept
Here (8/2=12/3) but (20/6) is different. Therefore, the graph will show distinct parallel lines.
Step 2
Why this answer is correct
The correct answer is C. रेखाएं अलग समानांतर हैं / Lines are distinct parallel. Here (8/2=12/3) but (20/6) is different. Therefore, the graph will show distinct parallel lines.
Step 3
Exam Tip
यहां (8/2=12/3) लेकिन (20/6) अलग है। इसलिए ग्राफ में अलग समानांतर रेखाएं बनेंगी।
C. एक बिंदु पर कटती रेखाएं/Lines intersecting at one point
Step 1
Concept
Here \(5/3 \ne 8/4\) so the lines will not be parallel. They will intersect at one point.
Step 2
Why this answer is correct
The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(5/3 \ne 8/4\) so the lines will not be parallel. They will intersect at one point.
Step 3
Exam Tip
यहां \(5/3 \ne 8/4\) इसलिए रेखाएं समानांतर नहीं होंगी। वे एक बिंदु पर कटेंगी।
Here (2/1=4/2) but (10/7) is different. Therefore the graph will show distinct parallel lines.
Step 2
Why this answer is correct
The correct answer is C. समानांतर अलग रेखाएं / Distinct parallel lines. Here (2/1=4/2) but (10/7) is different. Therefore the graph will show distinct parallel lines.
Step 3
Exam Tip
यहां (2/1=4/2) लेकिन (10/7) अलग है। इसलिए ग्राफ में अलग समानांतर रेखाएं मिलेंगी।
The second equation is (3) times the first. Therefore both lines will appear as the same line in the graph.
Step 2
Why this answer is correct
The correct answer is B. एक ही रेखा / Same line. The second equation is (3) times the first. Therefore both lines will appear as the same line in the graph.
Step 3
Exam Tip
दूसरा समीकरण पहले का (3) गुना है। इसलिए ग्राफ में दोनों रेखाएं एक ही दिखाई देंगी।
One intersection point is the common solution of both equations. Therefore exactly one unique solution is obtained.
Step 2
Why this answer is correct
The correct answer is B. एक अद्वितीय हल / One unique solution. One intersection point is the common solution of both equations. Therefore exactly one unique solution is obtained.
Step 3
Exam Tip
कटने का एक बिंदु दोनों समीकरणों का सामान्य हल होता है। इसलिए केवल एक अद्वितीय हल मिलता है।
When all three ratios are equal both equations make the same line. This situation has infinitely many solutions.
Step 2
Why this answer is correct
The correct answer is C. एक ही रेखा / Same line. When all three ratios are equal both equations make the same line. This situation has infinitely many solutions.
Step 3
Exam Tip
तीनों अनुपात बराबर होने पर दोनों समीकरण एक ही रेखा बनाते हैं। ऐसी स्थिति में अनंत हल होते हैं।
C. एक बिंदु पर कटती रेखाएं/Lines intersecting at one point
Step 1
Concept
Here \(4/8 \ne 7/13\) so the slopes are different. Lines with different slopes intersect at one point.
Step 2
Why this answer is correct
The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(4/8 \ne 7/13\) so the slopes are different. Lines with different slopes intersect at one point.
Step 3
Exam Tip
यहां \(4/8 \ne 7/13\) इसलिए ढालें अलग हैं। अलग ढाल वाली रेखाएं एक बिंदु पर कटती हैं।
Here (2/6=1/3) but (4/10) is different so the lines are parallel. Such lines never meet.
Step 2
Why this answer is correct
The correct answer is C. समानांतर अलग रेखाएं / Distinct parallel lines. Here (2/6=1/3) but (4/10) is different so the lines are parallel. Such lines never meet.
Step 3
Exam Tip
यहां (2/6=1/3) लेकिन (4/10) अलग है इसलिए रेखाएं समानांतर हैं। ऐसी रेखाएं कभी नहीं मिलतीं।
One common point gives one unique solution. Therefore it is a consistent and independent pair.
Step 2
Why this answer is correct
The correct answer is A. संगत और स्वतंत्र / Consistent and independent. One common point gives one unique solution. Therefore it is a consistent and independent pair.
Step 3
Exam Tip
एक सामान्य बिंदु होने से एक अद्वितीय हल मिलता है। इसलिए यह संगत और स्वतंत्र युग्म है।
Completely overlapping lines are coincident. Every point on them satisfies both equations.
Step 2
Why this answer is correct
The correct answer is C. अनंत हल / Infinitely many solutions. Completely overlapping lines are coincident. Every point on them satisfies both equations.
Step 3
Exam Tip
पूरी तरह मिलने वाली रेखाएं संपाती होती हैं। उनके प्रत्येक बिंदु से दोनों समीकरण संतुष्ट होते हैं।
(2/4=3/6) but (6/15) is different, so the lines are parallel. Such a graph has no intersection.
Step 2
Why this answer is correct
The correct answer is C. अलग समानांतर रेखाएं / Distinct parallel lines. (2/4=3/6) but (6/15) is different, so the lines are parallel. Such a graph has no intersection.
Step 3
Exam Tip
(2/4=3/6) लेकिन (6/15) अलग है, इसलिए रेखाएं समानांतर हैं। ऐसे ग्राफ में कोई intersection नहीं होता।
The second equation is (2) times the first. Therefore, both will appear as the same line in the graph.
Step 2
Why this answer is correct
The correct answer is C. एक ही रेखा / Same line. The second equation is (2) times the first. Therefore, both will appear as the same line in the graph.
Step 3
Exam Tip
दूसरा समीकरण पहले का (2) गुना है। इसलिए ग्राफ में दोनों एक ही रेखा दिखेंगी।
Here \(x+y=\frac{7}{2}+\frac{9}{2}=\frac{16}{2}=8\). Values of (x) and (y) are read directly from the intersection point.
Step 2
Why this answer is correct
The correct answer is A. (8). Here \(x+y=\frac{7}{2}+\frac{9}{2}=\frac{16}{2}=8\). Values of (x) and (y) are read directly from the intersection point.
Step 3
Exam Tip
यहाँ \(x+y=\frac{7}{2}+\frac{9}{2}=\frac{16}{2}=8\)। प्रतिच्छेद बिंदु से (x) और (y) के मान सीधे पढ़े जाते हैं।
A. बिंदु (\left\(0,-5\right\))/Point (\left\(0,-5\right\))
Step 1
Concept
Substituting (\left\(0,-5\right\)) gives (5\left\(0\right\)-6\left\(-5\right\)=30). A negative (y)-intercept is plotted downward on the graph.
Step 2
Why this answer is correct
The correct answer is A. बिंदु (\left\(0,-5\right\)) / Point (\left\(0,-5\right\)). Substituting (\left\(0,-5\right\)) gives (5\left\(0\right\)-6\left\(-5\right\)=30). A negative (y)-intercept is plotted downward on the graph.
Step 3
Exam Tip
(\left\(0,-5\right\)) रखने पर (5\left\(0\right\)-6\left\(-5\right\)=30)। ऋण (y)-अवरोध ग्राफ में नीचे की ओर लगाया जाता है।
A. चिह्न और निर्देशांक क्रम की गलती/Error of sign and coordinate order
Step 1
Concept
In (\left\(7,-3\right\)), (x=7) and (y=-3). Reversing coordinates and changing sign makes the answer wrong.
Step 2
Why this answer is correct
The correct answer is A. चिह्न और निर्देशांक क्रम की गलती / Error of sign and coordinate order. In (\left\(7,-3\right\)), (x=7) and (y=-3). Reversing coordinates and changing sign makes the answer wrong.
Step 3
Exam Tip
बिंदु (\left\(7,-3\right\)) में (x=7) और (y=-3) है। निर्देशांक उलटने और चिह्न बदलने से उत्तर गलत हो जाता है।
C. वे समांतर और अलग हैं/They are parallel and distinct
Step 1
Concept
Dividing the second equation by (2) gives (2x+3y=15). Same left side with different constants gives parallel lines.
Step 2
Why this answer is correct
The correct answer is C. वे समांतर और अलग हैं / They are parallel and distinct. Dividing the second equation by (2) gives (2x+3y=15). Same left side with different constants gives parallel lines.
Step 3
Exam Tip
दूसरे समीकरण को (2) से भाग देने पर (2x+3y=15) मिलता है। समान बाएँ पक्ष और अलग नियतांक समांतर रेखाएँ देते हैं।
\(3.75=\frac{15}{4}\) and \(-2.5=-\frac{5}{2}\). It is better to convert decimal coordinates into simplified fractions.
Step 2
Why this answer is correct
The correct answer is A. (\left\(\frac{15}{4},-\frac{5}{2}\right\)). \(3.75=\frac{15}{4}\) and \(-2.5=-\frac{5}{2}\). It is better to convert decimal coordinates into simplified fractions.
Step 3
Exam Tip
\(3.75=\frac{15}{4}\) और \(-2.5=-\frac{5}{2}\)। दशमलव निर्देशांक को सरल भिन्न में बदलना बेहतर रहता है।
The first coordinate of a point is (x) and the second is (y). Do not change order while reading negative fraction coordinates.
Step 2
Why this answer is correct
The correct answer is B. \(x=-\frac{5}{2},\ y=3\). The first coordinate of a point is (x) and the second is (y). Do not change order while reading negative fraction coordinates.
Step 3
Exam Tip
बिंदु में पहला निर्देशांक (x) और दूसरा (y) होता है। ऋण भिन्न निर्देशांक पढ़ते समय क्रम न बदलें।
Here \(x+y=\frac{5}{2}+\frac{7}{2}=\frac{12}{2}=6\). Values of (x) and (y) are read directly from the intersection point.
Step 2
Why this answer is correct
The correct answer is A. (6). Here \(x+y=\frac{5}{2}+\frac{7}{2}=\frac{12}{2}=6\). Values of (x) and (y) are read directly from the intersection point.
Step 3
Exam Tip
यहाँ \(x+y=\frac{5}{2}+\frac{7}{2}=\frac{12}{2}=6\)। प्रतिच्छेद बिंदु से (x) और (y) के मान सीधे पढ़े जाते हैं।
A. बिंदु (\left\(0,-3\right\))/Point (\left\(0,-3\right\))
Step 1
Concept
Substituting (\left\(0,-3\right\)) gives (3\left\(0\right\)-4\left\(-3\right\)=12). A negative (y)-intercept is plotted downward on the graph.
Step 2
Why this answer is correct
The correct answer is A. बिंदु (\left\(0,-3\right\)) / Point (\left\(0,-3\right\)). Substituting (\left\(0,-3\right\)) gives (3\left\(0\right\)-4\left\(-3\right\)=12). A negative (y)-intercept is plotted downward on the graph.
Step 3
Exam Tip
(\left\(0,-3\right\)) रखने पर (3\left\(0\right\)-4\left\(-3\right\)=12)। ऋण (y)-अवरोध ग्राफ में नीचे की ओर लगाया जाता है।
A. चिह्न और निर्देशांक क्रम की गलती/Error of sign and coordinate order
Step 1
Concept
In (\left\(6,-2\right\)), (x=6) and (y=-2). Reversing coordinates and changing sign makes the answer wrong.
Step 2
Why this answer is correct
The correct answer is A. चिह्न और निर्देशांक क्रम की गलती / Error of sign and coordinate order. In (\left\(6,-2\right\)), (x=6) and (y=-2). Reversing coordinates and changing sign makes the answer wrong.
Step 3
Exam Tip
बिंदु (\left\(6,-2\right\)) में (x=6) और (y=-2) है। निर्देशांक उलटने से और चिह्न बदलने से उत्तर गलत हो जाता है।
C. वे समांतर और अलग हैं/They are parallel and distinct
Step 1
Concept
Dividing the second equation by (2) gives (x+2y=10). Same left side with different constants gives parallel lines.
Step 2
Why this answer is correct
The correct answer is C. वे समांतर और अलग हैं / They are parallel and distinct. Dividing the second equation by (2) gives (x+2y=10). Same left side with different constants gives parallel lines.
Step 3
Exam Tip
दूसरे समीकरण को (2) से भाग देने पर (x+2y=10) मिलता है। समान बाएँ पक्ष और अलग नियतांक समांतर रेखाएँ देते हैं।
\(2.25=\frac{9}{4}\) and \(-1.5=-\frac{3}{2}\). It is better to convert decimal coordinates into simplified fractions.
Step 2
Why this answer is correct
The correct answer is A. (\left\(\frac{9}{4},-\frac{3}{2}\right\)). \(2.25=\frac{9}{4}\) and \(-1.5=-\frac{3}{2}\). It is better to convert decimal coordinates into simplified fractions.
Step 3
Exam Tip
\(2.25=\frac{9}{4}\) और \(-1.5=-\frac{3}{2}\)। दशमलव निर्देशांक को सरल भिन्न में बदलना बेहतर रहता है।
The first coordinate of a point is (x) and the second is (y). Do not change order while reading negative fraction coordinates.
Step 2
Why this answer is correct
The correct answer is B. \(x=-\frac{3}{2},\ y=4\). The first coordinate of a point is (x) and the second is (y). Do not change order while reading negative fraction coordinates.
Step 3
Exam Tip
बिंदु में पहला निर्देशांक (x) और दूसरा (y) होता है। ऋण भिन्न निर्देशांक पढ़ते समय क्रम न बदलें।
A. बिंदु (\left\(3.5,2.5\right\))/Point (\left\(3.5,2.5\right\))
Step 1
Concept
\(\frac{7}{2}=3.5\) and \(\frac{5}{2}=2.5\). While reading a graph, understand the relation between fraction and decimal forms.
Step 2
Why this answer is correct
The correct answer is A. बिंदु (\left\(3.5,2.5\right\)) / Point (\left\(3.5,2.5\right\)). \(\frac{7}{2}=3.5\) and \(\frac{5}{2}=2.5\). While reading a graph, understand the relation between fraction and decimal forms.
Step 3
Exam Tip
\(\frac{7}{2}=3.5\) और \(\frac{5}{2}=2.5\)। ग्राफ पढ़ते समय भिन्न और दशमलव रूप का संबंध समझें।
Dividing the second equation by (2) gives (x+2y=7). Same left side with different constants gives parallel lines.
Step 2
Why this answer is correct
The correct answer is B. दोनों समांतर हैं / Both are parallel. Dividing the second equation by (2) gives (x+2y=7). Same left side with different constants gives parallel lines.
Step 3
Exam Tip
दूसरे समीकरण को (2) से भाग देने पर (x+2y=7) मिलता है। समान बाएँ पक्ष और अलग नियतांक समांतर रेखाएँ देते हैं।
(\left\(0,0\right\)) satisfies both (2x-y=0) and (x+3y=0). To check origin, put (x=0,\ y=0).
Step 2
Why this answer is correct
The correct answer is B. (2x-y=0) और (x+3y=0) / (2x-y=0) and (x+3y=0). (\left\(0,0\right\)) satisfies both (2x-y=0) and (x+3y=0). To check origin, put (x=0,\ y=0).
Step 3
Exam Tip
(\left\(0,0\right\)) दोनों समीकरणों (2x-y=0) और (x+3y=0) को संतुष्ट करता है। मूलबिंदु की जाँच में (x=0,\ y=0) रखें।
\(4.5=\frac{9}{2}\) and \(1.5=\frac{3}{2}\). Write decimal coordinates read from a graph as simplified fractions.
Step 2
Why this answer is correct
The correct answer is A. (\left\(\frac{9}{2},\frac{3}{2}\right\)). \(4.5=\frac{9}{2}\) and \(1.5=\frac{3}{2}\). Write decimal coordinates read from a graph as simplified fractions.
Step 3
Exam Tip
\(4.5=\frac{9}{2}\) और \(1.5=\frac{3}{2}\)। ग्राफ से मिले दशमलव निर्देशांक को सरल भिन्न में लिखें।
