Question

i need help really fast

Answer 1

With?

Answer 2

What is the sum of an 8-term geometric series if the first term is -11, the last term is 180,224, and the common ratio is -4

Answer 3

i need an answer

Answer 4

\(\LARGE\color{midnightblue}{ \rm S_n=\frac{a_1(1-r^n)}{1-r} }\)

Answer 5

) -143,231
B) -36,047
C) 144,177
D) 716,144

Answer 6

There is a formula for it in which you plug the numbers in to find your sum

And that is it^

Answer 7

You don't need the answer, you need to get a grip on this.

Answer 8

\(\LARGE\color{midnightblue}{ \rm S_8=\frac{(-11)(1-(-4)^8)}{1-(-4)} }\)

Answer 9

Where a1 is the first term

n is the number of numbers in the series (AKA 8)

and r is the ratio

Answer 10

i got -144,181.4

Answer 11

correct. close. I got 144,177, and it is POSITIVE.