Question

x+1 by x =2 then x cube +1 by x square
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Answer 1

Answer:

Step-by-step explanation:

x + 1/x = 2

We know that (a + b)³  = a³ + b³ + 3ab(a+b)

                       => a³ + b³ = (a + b)³ - 3ab(a+b)  

Thus x³ + 1/x³ = (x + 1/x)³ - 3(x)(1/x)(x + 1/x)

                       = 2³ - 3 (2)

                        = 8 - 6

                        = 2.