Question

http://screensnapr.com/v/GxzHcw.png
I CANT REMEMBER THIS FOR THE LIFE OF ME HAHA

Answer 1

Omg can nobody else?:P

Answer 2

@Satellite73 can you explain the sigma notation with an infinity? I have another question like that.

Answer 3

This looks like it's asking you to find the 44th term of an arithmetic sequence where the first term of the sequence is -4 and the difference between each term is 4.

I'm REALLY guessing at the notation here, as I can't be sure without seeing the full context of the problem.

Answer 4

I got it :DD

Answer 5

It's a[1]+(n-1)*d