Question

if x^2+1/x=7,then find the value of x^3+1/x^3​

Answer 1

Answer:

24

Step-by-step explanation:

x^2 + 1/x^2 = 7

(x + 1/x)^2 -2 = 7

x + 1/x=3 - (i)

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

               =  3^3-3 = 24

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