Question

1. If x + 1 /x= 5, find the value of x^3+1/x^3 ​

Answer 1

Answer:

110

Step-by-step explanation:

x+1/x=5

(x+1/x)³=125

x³+1/x³+3×(x×1/x)(x+1/x)=125

x³+1/x³=110

Answer 2

Answer:

Hey!!!

Here is your answer...

Given that :- x+1/x = 5

X+1=5x

5x-x=1

4x=1

X=1/4.

Then, x³+1/x³ = (1/4)³ +1/(1/4)³

= (1/16)+1/(1/16)

= 1+16/16/(1/16)

= 17/16×16/1

= 272/16

= 17.....

:. X³+1/x³ = 17....

Hope it helps...

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