Question

Find the sum of the first 5 terms of the series.

7 – 14 + 28 – 56 + ...

Answer 1

so is 7 our first term or is 7-14 our first term?

Answer 2

I honestly have no clue. That's what's throwing me off lol.

Answer 3

dont u use pemas????

Answer 4

pemdas*

Answer 5

next is 112 in the series

Answer 6

know that

Answer 7

I got 112 at one point but I lost my notes.

Answer 8

yes but im trying to figure out is wats given to us the first 4 or 2 terms.

Answer 9

112- 224 + 448 - 896

Answer 10

and so on

Answer 11

7 x 1 = 7
7 x 2 = 14
7 x 4 = 28
7 x 8 = 56
7 x 16 = 112

Answer 12

i think it's the first 4 terms but i think the question just gave too much of the series by just asking for the next one..

Answer 13

its multiplying the number that you are multiplying 7 with by 2 (if that makes sense)

Answer 14

Yes, @touseii45 it makes sense. Thank you lol.

Answer 15

and it goes in a pattern of minus, plus, minus, plus

Answer 16

You're welcome^_^

Answer 17

Alright so the answer is 77 :) thanks :D

Answer 18

Correct!(: