Hi there.

I am given these functions and I want to find out in which areas they are positive or negative.

x^y - 1

|x+y| - |x-y|

so the way i tried the first one is i set the function x^y-1 = c and take c = 0, simplifying i get y log (x) = 0. What do i do now?

Second one i did the same and ended up with

|x+y| = |x-y|