Summation Notation Formulas

I'm sorry that I don't know the code for sigma notation for the forums but my question is a fairly straight forward one.

I've been give

I would be a *serious* pain in the butt to input each number into the equation and add them all up, so I'd like to know if anyone knew the formulas? I have found the formulas.

At this url, and my question is...accoding to the formulas, I start with a negative number? Considering the number without an exponent or variable (-2) is negative. (Thinking)

Re: Summation Notation Formulas

Quote:

Originally Posted by

**UnstoppableBeast** I'm sorry that I don't know the code for sigma notation for the forums but my question is a fairly straight forward one.

I've been given

I would be a

*serious* pain in the butt to input each number into the equation and add them all up, so I'd like to know if anyone knew the formulas? I have found the formulas.

At this

url, and my question is...accoding to the formulas, I start with a negative number? Considering the number without an exponent or variable (-2) is negative. (Thinking)

Use "\sum_{n=1}^{35}(3n^2+5n-2)" along with TEX tags to get:

Re: Summation Notation Formulas

Quote:

Originally Posted by

**UnstoppableBeast** I'm sorry that I don't know the code for sigma notation for the forums but my question is a fairly straight forward one.

I've been give

I would be a

*serious* pain in the butt to input each number into the equation and add them all up, so I'd like to know if anyone knew the formulas? I have found the formulas.

At this

url, and my question is...accoding to the formulas, I start with a negative number? Considering the number without an exponent or variable (-2) is negative. (Thinking)

1. .

There are formulas to evaluate the first two summands, and the third is simply .

2.

There is a formula to sum cubes as well :)