Find the tenth term in the sequence 7, 9, 12, 16, 21 using recursive rule help me please

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

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