I need a common denominator?

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- Mar 20th 2011, 03:36 PMreallylongnicknamerational exp - simplify

I need a common denominator? - Mar 20th 2011, 03:50 PMpickslides
Try

Or find the lowest common mulitple of the 2. Maybe - Mar 20th 2011, 04:05 PMreallylongnickname

How's this look? - Mar 20th 2011, 04:23 PMpickslides
That's a good start but its not quite correct.

- Mar 20th 2011, 04:43 PMreallylongnickname
- Mar 20th 2011, 04:46 PMe^(i*pi)
You're not done cancelling yet. Recall your six times table

You're on the right track though - Mar 20th 2011, 05:08 PMreallylongnickname
Oh.

- Mar 20th 2011, 05:11 PMpickslides
- Mar 20th 2011, 06:45 PMreallylongnickname
Is this the final answer?

- Mar 20th 2011, 06:53 PMpickslides
- Mar 20th 2011, 07:07 PMProve It
- Mar 21st 2011, 04:26 AMHallsofIvy
In fact, it would have been better to use as your common denominator rather than .

- Mar 21st 2011, 05:21 AMProve It
Or even better still, note that , then your LCD is ...