Question

x + 1/x = 4, then the value of x² + 1/x2
8
14
16
20​

Answer 1

x+1/x =4

SQUARING ON BOTH SIDES WE WILL GET:-.

(x+1/x)²= 4²

(x)²+2(x)(1/x)+(1/x)²= 16

x²+2+1/x² = 16

x²+1/x² = 16-2

x²+1/x² = 14

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