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49 3/2 as a power of 7

+4 votes
691 views asked Jun 30, 2015 by Ceana S a Novice (10 points)

1 Answer

+2 votes

change 49 to 72 first. Now you have (72)3/2.

Now multiply indices (power of a power rule). 

2 x `3/2` = 3

so you have 7as your answer.

Alternatively, if you understand that the fractional part of the power is a root e.g. the 2 in `3/2` means square root, then root of 72 (from the 49) gives 7, leaving 73 as your answer as before.

answered Jul 10, 2015 by Andrew H a Novice (30 points)

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