What’s the circumference of 14.5

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

What is the definition of exponential decay?

3x + 4y = 5 x- 3y = -7 solve by substitution