Question

Please help !!
How would you find the 8th term of the arithmetic sequence:

-3.2, -3.4, -3.6, -3.8, ...

Answer 1

use formula an+b

a = sequence
n = nth term
b = difference from 1st# and sequence

Answer 2

I show you how to do this

a = -0.2
n = 8
b = -3.2 - (-0.2) = -3

now plug on formula

Answer 3

do you understand what I did ?

Answer 4

how did you get the values for a & n ?

Answer 5

i have never seen it done that way until now wow

Answer 6

the sequence is adding -0.2 to each number

-3.2 + -0.2 = -3.4 +-0.2 = -3.6 and so on

Answer 7

the question ask for the 8th term, that is what you are looking for so n = 8

Answer 8

okay i see. so every time the a value would be -0.2 ?

Answer 9

so if you plug the numbers this is what you get:

an + b

-0.2 (8) + (-3)
-1.60 -3 = -4.6

Answer 10

how would you have done it ? @nocontact115

Answer 11

no every time, just on this specific problem

Answer 12

say if there were a different problem how would you find it ?

Answer 13

you can add -0.2 until you get to the 8th term

Answer 14

got it ... thanks(:

Answer 15

yw :)

Answer 16

@ idontgetit i would have done it by using subtraction to find the difference between the numbers and added it to keep the pattern going.