If 2- 2x-1 = 16, then the value of x2 is :

D. 25

If (x3 + 1/x3) = 52, the value of (x + 1/x) is :

A. 4

If (x2 + 1/x2) = 102, then (x - 1/x) is :

B. 10

Value of k foe which (x - 1) is a factor of (x3 - k) is :

B. 1

If x100 + 2x99 + k is divisible by (x + 1), then the value of k is:

A. 1