Question

What is the sum of the geometric sequence -4, 24, -144, ... if there are 8 terms? (5 points)

Answer 1

@Owlcoffee

Answer 2

First find the geometric ratio.

Answer 3

would that be -4/24?

Answer 4

yes

Answer 5

-.167

Answer 6

Good, now, use the formula for the sum of a finite number of terms:
\[S_n = \frac{ a_1 (1-r^n) }{ 1-r }\]
Where "r" is the ratio, a1 is the first term and "n" the number of the desired terms to add.

Answer 7

nvm i got it

Answer 8

well done <3

Answer 9

ty<3 GIVE ME A MEDAL GAB ):