Question

Find the sum of the first 7 terms of the geometric series whose first term is −10 and whose common ratio is 3. CHECK ANSWER: -32790

Answer 1

I get -10,930.

Answer 2

ok crap what did i do wrong

Answer 3

LA u ryt

Answer 4

silver just muliply -10 by three and that answer by three and that answer by three till u hav 7 terms.then add them

Answer 5

that is what i did but it cant be right if he got that is mine right?

Answer 6

urz is wrong silver. LA's is right. ok the 7 terms are: -10, -30, -90, -270, -810, -2430, -7290

Answer 7

i c what ur problem is. you added the 7 terms after -10

Answer 8

yeah....

Answer 9

o ok i got it

Answer 10

THANKS MATE

Answer 11

no problem