Asked by dike Abigail

the third terms of a geometric progression is 360 and the sixth term is 1215. find the sum of the first four terms....
Answered by Steve
ar^5 = 1215
ar^2 = 360
now divide, and you have

r^3 = 27/8

you can take it from there, right?
Answered by Ella
Explain well
Answered by Anonymous
How did you get 27/8
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