Q. 134.8( 5 Votes )

If x = , then x3 + =
A. 2

B. 4

C. 8

D. 9

Answer :

Given x =


= x3 = 2 + √3


Similarly, 1/x3 = 2 - √3


X3 + 1/x3 = 2+ √3 + 2 - √3 = 4.

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