Question

x=3+√8 find the value of x4+1/x4

Answer 1

Hey mate, here is your answer :



x4 + 1 / x4

= 3 + ^8 × 4 + 1 / 3 + ^8 × 4
= 1


So, 1 is the correct answer.


Hope this answer helps you...

Answer 2

We will use simple rationalization and an identity to solve the given question.

Identity used:
(a + 1/a)^2 = a^2 + 1/a^2 + 2

Refer to the attachment.