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We know how to multiply and divide powers.

We can also do powers of powers.

For example, what is (a2)4 ?

Remember that c4 = c x c x c x c

     (a2)4 = a2 x a2 x a2 x a2

             = a2 + 2 + 2 + 2

             = a8

So (a2)4 = a2 x 4

This property is general




     (am)n = amn

And since (an)m = anm and mn = mn

It follows that

     (am)n = (an)m

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Question 1/5

1. (a6 b8)12 is

a72 b96

a18 b20

a60 b72

a24 b48