If x3 + 6x+ 4x + k is exactly divisible by (x + 2), then the value of k is :

C. - 8

If a + b + c = 0, then (a3 + b3 + c3) is equal to :

C. 3 ABC

If (x + 1/x) = 4, then (x41/x4) is equal to :

B. 194

If a + b + c = 0, then the value of (a2/bc + b2/ca + c2/ab) is :

D. 3

(x29 - x25 + x13 - 1) is divisible by:

B. (X - 1) BUT NOT BY (X + 1)