What is one question you still have about exponents?

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

How is working backward similar to solving an equation?