Please help me!!!!

What is the partial sum (see attached)

a 3,976
b 3,630
c 3,297
d 4,335

Question

Please help me!!!!

What is the partial sum  (see attached)

a   3,976 
b   3,630 
c   3,297 
d   4,335

nottim · Answer

more partial sums?? @Mimi_x3 You know anything?

anonymous · Answer

I cant see any attachment

nottim · Answer

she's uploading it now, toyn stark

mimi_x3 · Answer

partial sums involving series? summation?

anonymous · Answer

$$\sum_{i=12}^{28} -5+13i$$

mimi_x3 · Answer

Well, just expand one by one..I think that there's a formula for that..

nottim · Answer

hey, maybe you could help with rebercca14's previous question to Mimi.

mimi_x3 · Answer

But it's too long up to $28$..there is probably a formula which i cannot remmeber.

anonymous · Answer

@denyekwe any idea?

mimi_x3 · Answer

Is there by chance a formula rebercca?

anonymous · Answer

I do not know, that is the issue

anonymous · Answer

@rebercca14 give me a bit

anonymous · Answer

Okay, thank you

mimi_x3 · Answer

Well, if i can remmeber corrently..
$$-5+13(12)+-5(13(13)+-5+13(14)+....$$
the it goes up to $28$ then use use a calculatr

anonymous · Answer

i am sorry i cant figure it out at the moment

anonymous · Answer

Is it the same as it would be if the i was an n?

mimi_x3 · Answer

Yes, if $i$ does not mean complex numbers.

anonymous · Answer

I do not believe it does in this case but I am not positive

mimi_x3 · Answer

why are you no positive? @NotTim: Might be able to help.

mimi_x3 · Answer

not positive*

nottim · Answer

NotTim's NotPositive either. sorry. I just sent her a bunch of links in hopes that could help.

nottim · Answer

try searching summation on those links i sent.

mimi_x3 · Answer

Well, I'm sure that I'm right; if you don't trust me. you can read look at this site: http://www.mathsisfun.com/algebra/partial-sums.html