Question

Please help?!?
Find the sum of the first 12 terms of the sequence. Show all work for full credit.
1, -4, -9, -14, . . .

Answer 1

what king of sequence do u think this is?

Answer 2

Arithmetic

Answer 3

correct, so now what is ur common difference

Answer 4

-5

Answer 5

meaning what do you add or substract to get the next number?

Answer 6

ok correct

Answer 7

now u can add -5 to -14 and so on untill you get 12 terms and then add them all up, or use the Sn formula

Answer 8

you there?

Answer 9

ok thanks!

Answer 10

np