How do you write 89,637,421 in word and expanded form

2÷6+1/2 to the second power plus one

In trapezoid bath, ah=19.7 and et=16.1. identify be.

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