Please help me Solve for r: r/5 = 7 -2
2
35
-35
Which one is the answer

What are “like terms”? why can we only add like terms?

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

Plzzz answer both questions and i will give you 100 points