Question

Please help, will give medal and fan.

Find the sum of a finite geometric sequence from n = 1 to n = 5, using the expression −3(4)n − 1.

A) 1,023

B) 1,223

C) −1,023

D) −4,374

Answer 1

Is your expression written correctly @marylou004

Answer 2

yes

Answer 3

My answer is way far from the options @marylou004

Answer 4

It is ok thanks for trying to help.

Answer 5

In your expression -3 is being multiplied by 4 and n, am i right? @marylou004

Answer 6

I think so