Question

Please help!!

Write the sum using summation notation, assuming the suggested pattern continues.

-9 - 4 + 1 + 6 + ... + 66

Answer 1

so you start at -9 and roll to 66 at steps of 5

Answer 2

Ok. So would the answer be: summation of the quantity negative nine plus five n from n equals zero to infinity

Answer 3

\[\sum_{n=-9}^{\infty}\]

Answer 4

all my answer choices have n=0, then infinity or 15 at the top, and on the side: -45n or (-9+5n). So I thought I would have:
infinity at the top, n=0 at the bottom, and (-9+5n) on the side.

Answer 5

\[\sum_{k=0}^{\infty} = -9+(k-1)5\]

Answer 6

change the k to n

Answer 7

wait... that would mean n=0 is -14

Answer 8

\[\sum_{n=0}^{\infty} = -4+(n-1)5\]

Answer 9

that's not an answer choice

Answer 10

that way n=0 is -9

Answer 11

what choice do you have?

Answer 12

a. summation of negative forty five times n from n equals zero to fifteen

b. summation of the quantity negative nine plus five n from n equals zero to fifteen

c. summation of the quantity negative nine plus five n from n equals zero to infinity

d. summation of negative forty five times n from n equals zero to infinity

Answer 13

looks like c if you want -9 to infinity

Answer 14

That's what I thought.

Answer 15

it works too

Answer 16

just tested it

Answer 17

That wasn't correct. Could it be b?

Answer 18

yea 0 to 15 gives to -9 to 66

Answer 19

b* dayum i soo sleepy i saw 0 as b