Hello(adsbygoogle = window.adsbygoogle || []).push({});

I need some help with some maths problems. Actually I am sorta of confused.

My Questions:

1. Rewrite without rational exponents, and simplify, if possible.

a. y^(1/7)...... I am so confused what it is about. I mean I can't do anything with the expressions, can I?

b. (x^2.y^2)^(1/3)...... kinda of similar to above one but wat am I supposed to do with expression....

2. Rewrite with positive exponents.

a. y^(-1/7)........ Am I supposed to just change the sign of power to +ve??

3. Use rational exponents to simplify. Write the answer in radical notation if appropriate.

a. (a^2)^(6).........

4. Find domain of f(x)= (x+5)^(1/2). (x+7)^(-1/2) hints badly needed...

I have test tomm so pls reply ASAP. Don't solve it right away but provide me with hints pls.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Some Maths Problems

**Physics Forums | Science Articles, Homework Help, Discussion**