MCQ Collection
WBJEE Mathematics MCQs
Practice WBJEE Mathematics questions with answers and explanations.
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Correct Answer: A. 8
Explanation:
By Vieta, α+β=8.
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Correct Answer: B. 30
Explanation:
Determinant=5×6=30.
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Correct Answer: A. 100
Explanation:
|v|²=6²+8²=100.
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Correct Answer: D. 14
Explanation:
f′(x)=2x, so f′(7)=14.
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Correct Answer: A. 6.0
Explanation:
(8+4)/2=6.0.
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Correct Answer: A. 136
Explanation:
|v|²=10²+6²=136.
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Correct Answer: B. 4
Explanation:
f′(x)=2x, so f′(2)=4.
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Correct Answer: D. 6.5
Explanation:
(3+10)/2=6.5.
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Correct Answer: D. 64
Explanation:
Determinant=8×8=64.
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Correct Answer: C. 181
Explanation:
|v|²=9²+10²=181.
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Correct Answer: D. 20
Explanation:
f′(x)=2x, so f′(10)=20.
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Correct Answer: B. 4
Explanation:
(2+6)/2=4.0.
