Hello 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.