Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 331-340 of 600 questions.
If (p(x)=x-2-4x+k) and (p(1)=p(3)), what can be said about (k)?
C. कोई भी वास्तविक मानAny real value
(p(1)=k-3) और (p(3)=k-3) दोनों बराबर हैं। इसलिए (k) कोई भी वास्तविक मान हो सकता है। / (p(1)=k-3) and (p(3)=k-3), so they are equal. Hence (k) can be any real value.
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Which is a factor of \(2x^3-9x^2+13x-6\)?
A. (x-1)
(p(1)=2-9+13-6=0) है इसलिए (x-1) गुणनखंड है। विकल्प जांच में छोटे मान पहले लगाएं। / (p(1)=2-9+13-6=0), so (x-1) is a factor. In option checking, try small values first.
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If (p(x)=x-3-2x-2-5x+6), which of the following is not a zero?
B. (2)
(p(2)=8-8-10+6=-4) है इसलिए (2) शून्यक नहीं है। बाकी विकल्पों को भी प्रतिस्थापन से जांच सकते हैं। / (p(2)=8-8-10+6=-4), so (2) is not a zero. The other options can be checked by substitution.
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A. \(x^2+3x+2\)
मूल शून्यक (-2) और (-3) हैं, इसलिए नए शून्यक (-1) और (-2) हैं। नया बहुपद \(x^2+3x+2\) है। / The original zeroes are (-2) and (-3), so the new zeroes are (-1) and (-2). The new polynomial is \(x^2+3x+2\).
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If \(\alpha\) and \(\beta\) are zeroes of \(x^2-4x+1\), what is \(\alpha^3+\beta^3\)?
A. (52)
\(\alpha+\beta=4\) और \(\alpha\beta=1\) है। (\alpha-3+\beta-3=\(\alpha+\beta\)3-3\alpha\beta\(\alpha+\beta\)=64-12=52)। / \(\alpha+\beta=4\) and \(\alpha\beta=1\). (\alpha-3+\beta-3=\(\alpha+\beta\)3-3\alpha\beta\(\alpha+\beta\)=64-12=52).
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For which (k) does \(x^2+kx+9\) have one zero three times the other and both positive?
A. \(-4\sqrt{3}\)
शून्यक (t) और (3t) मानें, तो \(3t^2=9\) से \(t=\sqrt{3}\) है। योग \(4\sqrt{3}\) है इसलिए \(k=-4\sqrt{3}\)। / Let the zeroes be (t) and (3t), so \(3t^2=9\) gives \(t=\sqrt{3}\). The sum is \(4\sqrt{3}\), hence \(k=-4\sqrt{3}\).
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If \(\alpha\) and \(\beta\) are zeroes of \(x^2-8x+k\) and \(\alpha-\beta=2\), what is (k)?
A. (15)
योग (8) और अंतर (2) से शून्यक (5) और (3) हैं। गुणनफल (15) है इसलिए (k=15)। / From sum (8) and difference (2), the zeroes are (5) and (3). Their product is (15), so (k=15).
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The sum of zeroes of the quadratic polynomial \(kx^2+6x+4\) is (-3). What is (k)?
A. (2)
योग \(-\frac{6}{k}\) है और यह (-3) है। इसलिए (k=2) होगा। / The sum is \(-\frac{6}{k}\), and it equals (-3). Therefore, (k=2).
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If the zeroes of \(x^2-10x+q\) are (2r) and (3r), what is (q)?
A. (24)
योग (5r=10) से (r=2) है। गुणनफल \(2r\cdot3r=6r^2=24\) है। / From the sum (5r=10), (r=2). The product is \(2r\cdot3r=6r^2=24\).
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If the zeroes of (p(x)=x-3+ax-2+bx+8) are (-1), (-2), and (-4), what is (a+b)?
A. (21)
बहुपद ((x+1)(x+2)(x+4)=x-3+7x-2+14x+8) है। इसलिए (a+b=21)। / The polynomial is ((x+1)(x+2)(x+4)=x-3+7x-2+14x+8). Hence (a+b=21).
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