find the value of x3 + 1/ x3 , when x +1/x =15
The second last step should be
3375 - 45 = x3 + 1/x3
⇒ x3 + 1/x3 = 3330
Hence, the answer.
If (x+1x)=4, find the value of
(1) (x3+1x3)
(2) (x−1x)
(3) (x3−1x3)
If x+1x=5, find the value of x3+1x3.