Question

Use the formula for the sum of the first n terms of a geometric sequence to solve. Find the sum of the first 8 terms of the geometric sequence: -8, -16, -32, -64, -128, . . . .

Answer 1

@FaiqRaees

Answer 2

than you assume the first with 3rd how many get ?
and so too the second with 4th how many get ?

Answer 3

i dont know @jhonyy9

Answer 4

@jhonyy9 help

Answer 5

@ganeshie8

Answer 6

-8-32=-40 and -16-64 = -80

so what is your opinion about this ?

Answer 7

i got -248

Answer 8

A. -2003
B. -2040
C. -2060
D. -2038

Answer 9

but these are my choices

Answer 10

-8-16-32-64-128-256-512-1024 =

-8-32 =-40
-16-64=-80
-128-512=-640
-256-1024=-1280
----------------------
assume these = -2040

Answer 11

so choice B. is true

Answer 12

ok. ?

Answer 13

thankyou.. can you help me with ssome others

Answer 14

welcome

just post on the open questions column and tag me there please