dgfgrafgdfge111

How?

Thanks for the great solution!!! I would never had know how to do this if it weren't for you!!!

According to your posts, you're the one who posted a messed up post in my other question too. So I guess it isn't me but you who has a major mind problem.

P.S. GET A LIFE!!!!

Do you have a brain? In every single question I am posting, I am reading the solution to learn. Of course you wouldn't understand, because in reality you're the one posting b******t as you just did now. And anyways, who are you to tell me that I'm posting b******t? Also, it doesn't matter what you say because nobody cares about you!!!!!

I know the correct answer but I'm not sure how to get it. So technically, I'm asking for a solution.

I tried this, but I'm still not sure how to do it.

Wow heureka! You have a greatly presented solution!!!

Sum if n terms of a geometric sequence: a1(1-r^n)/(1-r)=168(1-(3/4)^8)/(1/4)=604.724121094.

Melody, school is over. It's the summer!!!! How could I have any homework? These are just problems in a practice book for a math competition that I want to do better in. Even if I had homework that I didn't know how to do, I would ask my teacher for help, not post it here!

I understand this combination, but how did you find this from the beginning?