The complex numbers $z$ and $w$ satisfy $|z| = |w| = 1$ and $zw \ne -1.$ (a) Prove that $\overline{z} = \frac{1}{z}$ and $\overline{w} = \frac{1}{w}.$ (b) Prove that $\frac{z + w}{zw + 1}$ is a real number.

An alternative to car buying is to make monthly payments for a period of time, and then return the vehicle to the dealer, or purchase it. this is called

Afunction, f(x), represents the height of a plant x months after being planted. students measure and record the height on a monthly basis. select the appropriate domain for this situation. a. the set of all positive real numbers b. the set of all integers oc. the set of all positive integers od. the set of all real numbers reset next

Which of the following expressions cannot be simplified to x – 2?