Question

if x+1/x =4 find the value of x2 +1/x2

Answer 1

( x + 1 / x ) = 4

Square on both sides,

( x + 1 / x )^2 = 4^2

x^2 + 1 / x^2 + 2( x × 1 / x ) = 16

x^2 + 1 / x^2 + 2 = 16

x^2 + 1 / x^2 = 16 - 2

x^2 + 1 / x^2 = 14

Answer 2

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αиѕωєя:


Given;

Square x + 1/x we get ;

x² + 1/x² + 2
= 4²
= 16 

x² + 1/x²= 14

___________

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