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1 . a3-b3=36,a-b=3

A. -1
B. 3
C. 0
D. 1

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Answer: Option D

Explanation:

{we have, a}^{3} {-b}^{3} =36, a-b=3 we know, a^{3} {-b}^{3} = {(a - b)}^{3} +3ab (a - b) {⇒36=3}^{3} +9ab \Rightarrow 27 + 9 a b = 36 \Rightarrow 9 a b = 36 - 27 \Rightarrow a b = \frac{9}{9} a b = 1

পরিবার পরিকল্পনা অধিদপ্তর || এমএলএসএস / নিরাপত্তা প্রহরী (21-01-2023)

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2 . 3=3

A. 6
B. 24
C. 18
D. 36

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Answer: Option D

Explanation: