geometric sequence question pt. 2!

Question

anonymous · Answer

@Concentrationalizing i got A. can you check my answer? im not sure i did it right!

anonymous · Answer

yes i have done that but i am getting such weird answers i think i miss steps or something.  im not good with them when the numbers are fractions

jhannybean · Answer

One sec, I am solving it also.

anonymous · Answer

okay thanks

anonymous · Answer

@jim_thompson5910  hey are you able to solve this real quick and let me know if A is right?

jim_thompson5910 · Answer

were you able to find the first term?

they give you the third term a3 = 128

use that to find a1

anonymous · Answer

i got the first term to be 8..is that what you got?

jim_thompson5910 · Answer

no, the first term is not 8

anonymous · Answer

hmm okay. i will go through it again.

jim_thompson5910 · Answer

to go backwards, instead of multiplying by -1/4, divide by -1/4

jim_thompson5910 · Answer

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jhannybean · Answer

I got an obnoxiously large number, wasn't sure is that was correct..

jim_thompson5910 · Answer

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jim_thompson5910 · Answer

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