x − 1/x = 1 হলে x3 - 1/x3 এর মান কত?

A 4.0

B 1.0

C 2.0

D 3.0

Solution

Correct Answer: Option A

আমরা জানি ,x3-1 ⁄ x3
=(x–1 ⁄  x)3+3 x  1⁄ x (x-1⁄x)
=13+(3× 1)=1+3=4

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