Question

if x+1/x=5 then find the value of x^3+1/x^3

Answer 1

Answer :

Given that,

x + 1/x = 5

Now, x³ + 1/x³

= (x + 1/x)³ - 3 (x × 1/x) (x + 1/x)

= 5³ - 3 (1) (5)

= 125 - 15

= 110

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