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1. − 1 x = 1 , x 3 − 1 x 3 = ?
- A. 1
- B. 1
- C. 1
- D. 1
Answer: Option D
Explanation:
দেয়া আছে,
x−1/x=1
x^3−1/x^3
=(x−1/x)^3+3.x.1/x(x−1/x)
=(1)3 +3.1
=4
x−1/x=1
x^3−1/x^3
=(x−1/x)^3+3.x.1/x(x−1/x)
=(1)3 +3.1
=4
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