Question

find the value of this

Answer 1

hope it helps you...

Answer 2

here x+1/x=4
squaring both sides we have,
[x+1/x]^2=x^2+1/x^2+2.
(4)^2=x^2+1/x^2+2
16-2=x^2+1/x^2
14=x^2+1/x^2
hence the ans of this question is 14