summation

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Samanamsonite
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26 Jan 2012, 11:49 am

how do you use summation. i love math but i cant seem to figure this one out. or when and where you would use it

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mercercles
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28 Jan 2012, 12:29 pm

Summation is just adding. Are you asking about the sigma notation?

Samanamsonite
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28 Jan 2012, 1:52 pm

yes that one

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mercercles
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29 Jan 2012, 7:41 am

http://en.wikipedia.org/wiki/Summation

You start with the index below the sigma, and work your way up to the number above the sigma, adding each term as you go. it's the same as a for loop in computer programming.

Samanamsonite
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29 Jan 2012, 10:21 pm

oooooooohhh...... thanks

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ruveyn
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30 Jan 2012, 10:18 am

Samanamsonite wrote:

how do you use summation. i love math but i cant seem to figure this one out. or when and where you would use it

Instead of writing a1 + a2 + .... + aN you write
SIGMA (ak) (k = 1...N)

In normal print the k is the index of the summation and the lower limit 1 is written below the SIGMA and the upper limit N is written above the SIGMA

ruveyn

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