If x+1/x=2,find the value of x^3 +1/x^3=
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(x + 1 / x)³ = 2³
using formula--+
(a + b) ³ = a³ + b³ + 3ab ( a + b)
= x³ + 1/x³ + 3× x × 1 /x ( x + 1 / x) = 8
= x³ + 1 / x³ + 3 × 2 = 8
x³ + 1 /x³ = 2 Ans.
rakeshjilla:
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