Question

1
1
1
4
1
2
If x-
4
= 5, find the values of x' +
and x* +
х
2
X х
X х​

Answer 1

Answer:

If x + 1/x = 5, find the value of x2 + 1/x2

Given :

( x + 1 /x ) = 5

We need to find x2 + 1 / x2

( x + 1 / x )2 = 25

= x2 + 1 / x2 + 2 (x)(1/x) = 25

= x2 + 1/x2 + 2 = 25

= x2 + 1 / x2 = 25 – 2

= x2 + 1 / x2=23

Hence x2 + 1 / x2 = 23