Write a matrix to represent the following system

2x + 6y = -12
5x - 5y = 10

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

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

Me i’m stuck on all these questions besides the two bottom ones