Question

Date:
Page No
91+ | 25
x
Find ...।
03if X + 1 by x is equal to 5 find x cube + 1 by x cube ​

Answer 1

Answer:

Heya user.......❤

Given :x+ 1/x = 5

To find : x^3 + 1/x^3

we have to use this formula..

x^3 + 1/x^3 = (x+ 1/x) ^3 - 3 x×1/x ( x+ 1/x)

Therefore,

(x^3 + 1/x^3)

= ( 5) ^3 - 3 × 5

= 125 - 15

= 110

Hope it’s helpful...... ☺