Hi guys! I would really love help with some questions on my exam review. My exam is tomorrow and I'm completely confused! Help would be very much appreciated.

Find the domain of:

$\displaystyle f(x) = lnX / x^2 + 4$

Solve for X:

$\displaystyle 2^x^-^1 = 3^x$

I know I need to make them the same base, but I don't know what would be simplest way to do that here.

Determine if (x - 1) is a factor of:

$\displaystyle -x^7^6^2 + 950x^3^4^8 - 938x^2^5 - 13$

I have absolutely no clue what to do here, except synthetic division with 762 places...