How would I evaluate 9^(3/2) without a calculator?

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- September 28th 2008, 11:19 PMNaurIrregular powers without a calculator
How would I evaluate 9^(3/2) without a calculator?

- September 28th 2008, 11:24 PMJhevon
see post #3 here, then you tell us

- September 29th 2008, 12:02 AMNaur
WELL then I'd go 9^3 = 729, and then I'd root 729: 729^.5 = 27.

And that works fantastically, thank you. But at the same time, it seems like it's cutting out even more work for myself. Though it works, I've got a timed exam coming up that I'm preparing vigorously for, and doing 9 cubed isn't going to save time...

Do you know a quicker way? I could always verify with that method once I've finished the questions....

Thanks a heap though :D - September 29th 2008, 12:04 AMJhevon
- September 29th 2008, 12:05 AMNaur
Why yes it would. Thanks very much. :D

That'll do nicely.