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1. x- 1 ⁄ x=5 হলে x2+1 ⁄ x2=কত?
- A. 21
- B. 21
- C. 21
- D. 21
Answer: Option B
Explanation:
x - 1/x = 5
X2 + 1/x2 = (x - 1\x)2 + 2x.1/x
= 52 + 2
= 25 + 2
= 27
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1. x- 1 ⁄ x=5 হলে x2+1 ⁄ x2=কত?
Answer: Option B
Explanation:
x - 1/x = 5
X2 + 1/x2 = (x - 1\x)2 + 2x.1/x
= 52 + 2
= 25 + 2
= 27
Post your comments here: