IF x = 7-4*3 1/2 ,then find x 3 +1/x 3
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X = 7–4×r(3)
1/X = 1/(7–4×r(3)) = 7+4×r(3)
X + 1/X = 14
X³ + 1/X³ +3•X•1/X•(X + 1/X) = 14³ = 2744
X³ + 1/X³ + 3×14 = 2744
X³ + 1/X³ = 2744 – 52 = 2692
1/X = 1/(7–4×r(3)) = 7+4×r(3)
X + 1/X = 14
X³ + 1/X³ +3•X•1/X•(X + 1/X) = 14³ = 2744
X³ + 1/X³ + 3×14 = 2744
X³ + 1/X³ = 2744 – 52 = 2692
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