What is the sum of a 7-term geometric series if the first term is 6, the last term is 24,576, and the common ratio is −4?

can you please explain

Question

What is the sum of a 7-term geometric series if the first term is 6, the last term is 24,576, and the common ratio is −4?

can you please explain

anonymous · Answer

do you know the formula?

mallorysipp234 · Answer

nopeee

anonymous · Answer

S = a1 (1 - r^n) / (1 - r)

what do you think the a1 and r mean?

mallorysipp234 · Answer

a1 is probably the first term.
and then the r is likely the ratio.

anonymous · Answer

good. Do we know what they are?

mallorysipp234 · Answer

first term is 6, and the common ratio is -4

anonymous · Answer

plug and chug

anonymous · Answer

and what is n in this case?

mallorysipp234 · Answer

i was just about to ask what is n. lol

i have no idea, i guess it would be 7???

mallorysipp234 · Answer

its not coming out to any of the multiple choice answers. :(

anonymous · Answer

n = 7

mallorysipp234 · Answer

@sourwing

anonymous · Answer

19662 should be the answer if do did the math right

mallorysipp234 · Answer

im not sure what i did wrong, but okayy thank you s m