Ahh, openstudy, does it still lag that much? :P

I have a matrix question, if anyone would help me out with this, I worked out something which I'll post below.

Question: Build a matrix so that $$\large a_{ij}=\sum_{k=1}^{i}kj$$

Question

Ahh, openstudy, does it still lag that much? :P

I have a matrix question, if anyone would help me out with this, I worked out something which I'll post below.

Question: Build a matrix so that $$\large a_{ij}=\sum_{k=1}^{i}kj$$

zepp · Answer

$$A=\left[\begin{matrix}1&2&3&4&5&...&j \ 3&6&9&12&15&...&3j \ 6&12&18&24&30&...&6j\ ...&...&...&...&...&...&...\ ...&...&...&...&...&...&...\ \sum_{k=1}^{i}k&...&...&...&...&...&j \sum_{k=1}^{i}k \end{matrix}\right]$$

zepp · Answer

@satellite73 @Directrix @Hero 
Possible to confirm my answer?

anonymous · Answer

looks good

e.cociuba · Answer

@primeralph Next time you degrade a woman through pm, I will personally embarrass you to the entire OpenStudy population myself. If you don't have anything nice to say, don't say it. If I ever catch you degrading a woman for her looks again, I will degrade you in front of everyone. Don't underestimate the power of a girl, because I will easily dominate you. Just because you have your settings placed on "this user does not accept messages", doesn't give you the right to message someone and tell them they are "ugly" without allowing them to message you back. Your personality is the only ugly thing here. Change it and grow a pair of balls while you're at it.

ell · Answer

He called someone ugly? Man, look whos talkin!

primeralph · Answer

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