Question

Find the sum of the first 7 terms of the geometric series -3, 6, -12, …

Answer 1

the pattern is multiplying each number by -2... so carry on after -12.

Answer 2

after you get to the 7th term, just add all the numbers together

Answer 3

I have to find the sum

Answer 4

yeah after you find the 7th term by multiplying by -2 then you add all the numbers together to find the sum

Answer 5

-3, 6, -12
what's -12 times -2?
it's 24.
-3,6,-12,24
24 times -2? it's -48
-3, 6, -12, 24, -48
-48 times -2? it's 96
-3, 6, -12, 24, -48, 96
96 times -2? it's -192
-3, 6, -12, 24, -48, 96, -192
now add all 7 of those together to get the sum