(81)1/2 =
3
9
27
81
x2
x-2
x3
x-3
If 3x - y = 27 and 3 x + y = 243, then x = ?
0
2
4
6
x 1/3
x 2/3
x6
x 3/2
x-4
x8
x
x4
(a - b)2 × (a - b)-4 =
(a - b)
(a - b)2
1/(a - b)2
(a - b)6
a
a2
a-2
a3
(64/27)3
4/3
3/4
