if x+1/x=5,find the value of x^3+1/x^3
(in short answer type question)
Answers
Answered by
1
It is given that x+1/x=5 ------(i)
=> (x+1/x)^3=5^3
=>x^3+(1/x)^3+(3×x×1/x)(x+1/x)=125
=>x^3+(1/x)^3+3×5=125 [Using (i)]
=>x^3+(1/x)^3+15=125
=>x^3+(1/x)^3=125-15
=>x^3+(1/x)^3=110
I hope my ans helps.
Pls mark my ans as the brainliest.
Similar questions