Question

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What is the 20th term of the arithmetic sequence 4, -2, -8, … ?

Answer 1

What is the common difference?

Answer 2

Once you know the common difference you can just plug in the things that you have into the arithmetic sequence equation:
a_n=a_1+(n-1)d

Answer 3

It looks like it grows from -4, to -6, and so on. But when I write it all out i get the wrong answer

Answer 4

yea so the common difference is -6 so plug it into the equation:
a_1=first term
n=position number of what you are trying to find
a_n=4+(20-1)-6

Answer 5

what did you get?

Answer 6

110?

Answer 7

its -110

Answer 8

Oops, meant that. Thanks!

Answer 9

no problem!