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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 name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?

If the square of a positive integer is added to 2 times the integer the result is 48. find the integer.