Question

X + 1 by X equal to 4 then x^4 + 1 by x^4 is equal to what

Answer 1

x + 1/x=4
(x + 1/x)^2 = 4^2
x^2 + 1/x^2 +2=16
x^2 + 1/x^2 =16-2
x^2 + 1/x^2=14
(x^2+1/x^2)2=14^2
x^4+1/x^4+2=196
x^4+1/x^4=196-2
x^4+1/x^4=194