If x+1/x=5 find the value of x^3+1/x^3 for 9th stamdard
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(x + 1/x) = 5
Cube on both sides,
(x + 1/x)³ = 5³
x³ +1/x³ + 3(x×1/x)(x +1/x) =125
x³ +1/x³ + 3(1)(5)=125
x³ +1/x³ + 15 = 125
x³ +1/x³ = 125-15
x³ +1/x³ = 110
I hope this will help you
-by ABHAY
Cube on both sides,
(x + 1/x)³ = 5³
x³ +1/x³ + 3(x×1/x)(x +1/x) =125
x³ +1/x³ + 3(1)(5)=125
x³ +1/x³ + 15 = 125
x³ +1/x³ = 125-15
x³ +1/x³ = 110
I hope this will help you
-by ABHAY
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