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What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

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

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true