if x+1/x= 7 then findx^3+1/x^3
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(x+ 1/x)³ = x³ + 1/x³ + 3 (x+1/x)
x³ + 1/x³ = (x+ 1/x)³ - 3 (x+1/x) = 7³ - 3 (7) = 343 - 21 = 322
x³ + 1/x³ = (x+ 1/x)³ - 3 (x+1/x) = 7³ - 3 (7) = 343 - 21 = 322
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