Question

if x+1/x =5 find the value of x^4+1/x^4

Answer 1

x + 1/x = 5

So, x^2 + 1/x^2 = (x+1/x)^2 -2

=(5)^2 - 2

=25-2=23......

Now, x^4 + 1/x^4 = (x^2+1/x^2)^2 - 2

= (23)^2 - 2

=