Answer:
a. 54.75
b. 2.64
Step-by-step explanation:
(x + 40) * (x + 40) =
(x + 40)² =
x² + 80x + 1600
140.19
plss put me as branlist if correct i mean if u want:)
an = 63(-1/3)^(n-1)
This is a geometric sequence with first term 63 and common ratio -1/3.
The equation for the nth term is
an = 63(-1/3)^(n-1).