Question

Medal and Fan!
Find the sum of a finite geometric sequence from n = 1 to n = 6, using the expression −2(5)^(n − 1).

Answer 1

well plug in n....then plug in the other n. im confused. sorry. maybe.....@MaimiGirl could help

Answer 2

@ikram002p

Answer 3

a. 1223
b. -1023
c. -7812
d. 7812

Answer 4

@dan815

Answer 5

can you find the sum of geometric series ?

Answer 6

ok dnt find it :P
u only have six terms
−2(5)^(n − 1)

so the sum = −2(5)^(0).+ −2(5)^(2).+ −2(5)^(2).+ −2(5)^(3).+ −2(5)^(4).+ −2(5)^(5).

Answer 7

I did that but it keeps giving me the wrong answer @ikram002p

Answer 8

what is ur answer ?

Answer 9

1 - 10 + 100 - 1000 + 10000 - 100000

Answer 10

and finall answer is ?

Answer 11

-90909

Answer 12

that is wrong

Answer 13

the adding or whats above it?

Answer 14

http://www.wolframalpha.com/input/?i=+%E2%88%922%285%29^%280%29%2B+%E2%88%922%285%29^%281%29%2B+%E2%88%922%285%29^%282%29%2B+%E2%88%922%285%29^%283%29%2B+%E2%88%922%285%29^%284%29%2B+%E2%88%922%285%29^%285%29

Answer 15

thank you so much!

Answer 16

np :)