MCQ Collection
WBJEE Mathematics MCQs
Practice WBJEE Mathematics questions with answers and explanations.
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Correct Answer: D. 20
Explanation:
Determinant=2×10=20.
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Correct Answer: D. 25
Explanation:
|v|²=3²+4²=25.
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Correct Answer: A. 8
Explanation:
f′(x)=2x, so f′(4)=8.
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Correct Answer: B. 6.5
Explanation:
(5+8)/2=6.5.
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Correct Answer: C. 16
Explanation:
By Vieta, α+β=16.
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Correct Answer: D. 28
Explanation:
Determinant=7×4=28.
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Correct Answer: A. 100
Explanation:
|v|²=8²+6²=100.
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Correct Answer: B. 18
Explanation:
f′(x)=2x, so f′(9)=18.
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Correct Answer: C. 6
Explanation:
By Vieta, α+β=6.
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Correct Answer: C. 11
Explanation:
By Vieta, α+β=11.
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Correct Answer: D. 48
Explanation:
Determinant=6×8=48.
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Correct Answer: C. 149
Explanation:
|v|²=7²+10²=149.
