UGH CAN SOMEONE PLS HELPW WITH THIS

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

If i have one apple and give you the apple, how many apples do i have?

Aquadratic equation in standard from is written ax^2= bx+c, where a, b and c are real numbers and a is not zero?