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Mathematics 23 Online
OpenStudy (anonymous):

Simplify: cube root of 5 over fourth root of 5

OpenStudy (anonymous):

I really don't understand how to answer it.

OpenStudy (campbell_st):

rewrite them in index notation 5^(1/3) and 5^(1/4) use the index law for division which means subtract the powers..

OpenStudy (anonymous):

Right, I understand, but when I do this, it does not give me the answer to any of the choices. :/

OpenStudy (anonymous):

Could you show me how you would solve it?

OpenStudy (anonymous):

I'm sorry if I'm asking for too much, I'm having a hard time w/ Algebra.

OpenStudy (campbell_st):

ok... so what did you get when you subtracted the powers..?

OpenStudy (anonymous):

I got...either -1 or 1. :/ I'm sorry, like I wrote, I'm not so good at Algebra.

OpenStudy (anonymous):

Wait a burger flipping second. I put the 3 and 4 into this structure 1/3 and 1/4. THEN I find the least common denominator, which would be 12. So, then I subtract 4/12 - 3/12 and get 1/12 and the answer would be 5 1/12. Correct?

OpenStudy (campbell_st):

well the power is 1/3 - 1/4 = 1/12 so the answer would be 5^(1/12) or the 12th root of 5

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