Type the general term for the following sequence.
-3, 6, -9, 12, -15, . . .

I know that I am wrong, but am I on the right track saying that it could be (1)-3^n? I just don't know how to approach it.

Question

Type the general term for the following sequence.
-3, 6, -9, 12, -15, . . .

I know that I am wrong, but am I on the right track saying that it could be (1)-3^n? I just don't know how to approach it.

anonymous · Answer

since the series alternates between a negative and a positive you come up with an initial term of (-1)^n, along with that the term increases by 3 each time, so you will have 3*n. The sequence is then (-1)^n*3n

anonymous · Answer

You can have n repeated in a sequence?

anonymous · Answer

By that do you mean have more than one n in the general term? If so, then yes.

anonymous · Answer

Oh yes, that is what I meant. And okay, thank you so much!!