Question

If x +1/x = 5, find the value of x³ + 1/x³​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

x+1/x=5

{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

(x)^3+(1/x)^3+15=125

(x)^3+(1/x)^3=125-15

(x)^3+(1/x)^3=115