If a + b + c = 6, a2 + b2 + c2 = 14 and a3 + b3 + c3 = 36, then the value of abc is
3
6
9
9
If then the value of x206 + x200 + x90 + x84 + x18 + x12 + x6 + 1 is
0
1
84
84
A.
0
P varies inversely with the product of Q and R. When Q = 6 and R = 12, P = 75. When Q = 5, R = 10, then P is
75
6
108
108