if x-1/x =6 , then find value of x^3-1/x^3
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Hey there!
x - 1/x = 6
cubing both sides,
(x-1/x)^3 = 216
x^3 - 1/x^3 - 3(x-1/x) = 216
x^3 - 1/x^3 - 3*6 = 216 [given x-1/x = 6]
x^3 - 1/x^3 = 216 + 18
x^3 - 1/x^3 = 234
Hope this helps You!
x - 1/x = 6
cubing both sides,
(x-1/x)^3 = 216
x^3 - 1/x^3 - 3(x-1/x) = 216
x^3 - 1/x^3 - 3*6 = 216 [given x-1/x = 6]
x^3 - 1/x^3 = 216 + 18
x^3 - 1/x^3 = 234
Hope this helps You!
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