Find the area of the circle. leave your answer in terms of pi.
a.324
b.18
c.9
d.81

The equation respenting the left table is

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 simplified form of square root of 400 to the 100th power ?