Thread: Incredibly simple indices sum

Can someone please use that math editor thing and change my post to write this equation down?

4 to the power of 3/2 * 2 to the power of negative 1/2

Anyway, thats the sum. My answer works out to 8 * 0.707 = 5.657, but in the math workbook the answer is 2. What am I doing wrong?

Originally Posted by yorkey

Can someone please use that math editor thing and change my post to write this equation down?

4 to the power of 3/2 * 2 to the power of negative 1/2

Anyway, thats the sum. My answer works out to 8 * 0.707 = 5.657, but in the math workbook the answer is 2. What am I doing wrong?

1. Your term is a product and not a sum:



2. Are you sure that you have posted the question correctly? If yes then your approximate result is correct. The exact value is .

So my answer was correct then. = 5.657.

Must be a typo in the book, because the way you wrote it out is exactly as it is in the book. Thanks!

Hi Yorkey

I also have problems with exponents. This video is good: http://www.mathplanet.com/education/...s-of-exponents

I use this forum to ask questions and watch videos on http://www.mathplanet.com

This forun rocks!!!!

Originally Posted by earboth

1. Your term is a product and not a sum:



2. Are you sure that you have posted the question correctly? If yes then your approximate result is correct. The exact value is .

would be better written as .

Originally Posted by yorkey

4 to the power of 3/2 * 2 to the power of negative 1/2
.......but in the math workbook the answer is 2.

IF answer is 2, then expression should be:
2^(3/2) * 2^(-1/2)