Evaluating Sums?

Hello,
I am currently working on a practice program in which I need to evaluate finite sums.


Before I get to coding this, I need to understand how to do it on paper...

Can someone please show me how I would go about evaluating this for example:

2n
E i
i=5


Step by step would appreciated b/c I am quite new to this whole concept.

Thanks in advance~!

Quote:

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Originally Posted by matthayzon89

Hello,
I am currently working on a practice program in which I need to evaluate finite sums.


Before I get to coding this, I need to understand how to do it on paper...

Can someone please show me how I would go about evaluating this for example:

2n
E i
i=5


Step by step would appreciated b/c I am quite new to this whole concept.

Thanks in advance~!

---

It's been a while since I've been in HS. I think the sum reduces to: n(2n + 1) with
index i =1. (you have an offset 5)

Before I go on, are you asking for help with the mathematics? If not, post the code
that you have at this point.

Quote:

---

Originally Posted by Char*Pntr

It's been a while since I've been in HS. I think the sum reduces to: n(2n + 1) with
index i =1. (you have an offset 5)

Before I go on, are you asking for help with the mathematics? If not, post the code
that you have at this point.

---

Yes, I am working on the program. But I would like to understand how to work out the mathematics first, before I actually code up the problem.

I appreciate your help man. It is really important that I understand this. I will most definitely study the explanation you will give, and would appreciate it if you can break it down to steps.

Quote:

---

Originally Posted by matthayzon89

Yes, I am working on the program. But I would like to understand how to work out the mathematics first, before I actually code up the problem.

I appreciate your help man. It is really important that I understand this. I will most definitely study the explanation you will give, and would appreciate it if you can break it down to steps.

---

I was hoping to help you get started, I still don't see any code yet. :confused:

Since now this is a case of understanding the mathematics, this should have been
posted in perhaps the General Discussion board.. np as this thread will probably be
moved there anyway.

I'm sorry, I can't as this is now completely off topic. This will only cause irritation to
the regulars here, and rightly so.

Seems to me to be simple summation of i... up to 2n.

So if n=6, i must reach 12 for the sequence to stop.

answer is 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12