1. ## Simple Summation Problem

I was marked wrong for this problem, but I think I am right. Can someone help me?

Evaluate:

3
$\displaystyle \sum$ $\displaystyle \imath$3
$\displaystyle \imath$=1

I came up with 18 for my answer, but like I said, I was marked wrong.

2. ## Re: Simple Summation Problem

Originally Posted by dahiestand
I was marked wrong for this problem, but I think I am right. Can someone help me?
Evaluate:
3
$\displaystyle \sum$ $\displaystyle \imath$3
$\displaystyle \imath$=1
I came up with 18 for my answer, but like I said, I was marked wrong.
$\displaystyle 1^3+2^3+3^3=~?$

3. ## Re: Simple Summation Problem

OK, so that is $\displaystyle \imath$ cubed, not $\displaystyle \imath$ multiplied by 3?

4. ## Re: Simple Summation Problem

The problem looks like this:

5. ## Re: Simple Summation Problem

You should get extra credit because you marked 18 which does not even exist on the answer sheet!

6. ## Re: Simple Summation Problem

Originally Posted by MaxJasper
You should get extra credit because you marked 18 which does not even exist on the answer sheet!
Haha! I thought the answer was 18 so I marked "none of the above".