Math, asked by t3rupaliRameth, 1 year ago

If x + 1/x = 7 then x^3 + 1/x^3 = ?

Answers

Answered by ShivajiK

5

X + 1/X = 7
X³ + 1/X³ + 3•X•1/X•(X + 1/X) = 343
X³ + 1/X³ + 3×7 = 343
X³ + 1/X³ = 343 – 21 = 322

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