If x+1 x=2 10 , then x^5+1 x^5 is equal to: - Vidyadip

MCQ

If $\text{x}+1\text{ x}=2\cos\frac{\pi}{10},$ then $\text{x}^5+\frac{1}{\text{x}^5}$ is equal to:

✓
$0$
B
$32$
C
$10$
D
$2$

✓

Answer

Correct option: A.

$0$

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