Question

Find the sum of the first eight terms: -800 + (-200) + (-50) + (-12.5) + … (Points : 1)
-1062.5

-1066.60

-1066.68

-1066.65

Answer 1

@whpalmer4

Answer 2

Can you tell me the relationship between the terms? In other words, how do we find those missing terms to add them up?

Answer 3

is this an arithmetic or geometric sequence?

Answer 4

geometric

Answer 5

Okay, and the constant ratio?

Answer 6

Ummm I don't know

Answer 7

well, if the first term is -800, and the second term is -200, what number do we multiply with -800 to get -200?

Answer 8

4?

Answer 9

That's the common ratio or constant ratio or geometric ratio

Answer 10

Oh okay :)

Answer 11

-800 * 4 = -200?

Answer 12

The answer is -1066.65

Answer 13

well, that's nice, but do you want to know how to get it, or not?

again, I ask for confirmation that you think that -800 * 4 = -200

Answer 14

Personally, I don't think -800 * 4 = -200. I think -800 * 1/4 = -200...

Answer 15

Actually that is correct. I divided by 4 to get my answer which is the same as multiplying by 1/4