Question

Find the 9th term of the arithmetic sequence.

a7= -42 and a11= -28;a9= help me plz

Answer 1

help

Answer 2

find the difference, can you do that?

Answer 3

yes

Answer 4

-28-(-42) right ?

Answer 5

14

Answer 6

adding the terms, but those are 7th and 11th terms and between them the difference is taken 3 times.

Answer 7

it is taken four times, not 3.

Answer 8

so do i divide 14 by 3 ?

Answer 9

by 4, ( by the number of times the difference is added)

Answer 10

My bad about saying 3.

Answer 11

i got 3.5

Answer 12

Ok now find the 9th terms knowing the the difference is 3.5

Answer 13

-35

Answer 14

Yup!!

Answer 15

thanks

Answer 16

Anytime!