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# Summation starting from 0

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1. Please could someone explain how to deal with this summation from 0? I don't understand the mark scheme...

Thanks!
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2. (Original post by PhyM23)
Please could someone explain how to deal with this summation from 0? I don't understand the mark scheme...

Thanks!
Sure. .

3. (Original post by PhyM23)
Please could someone explain how to deal with this summation from 0? I don't understand the mark scheme...

Thanks!
Well what part of the sum is affected by r=0
4. (Original post by PhyM23)
Please could someone explain how to deal with this summation from 0? I don't understand the mark scheme...

Thanks!
Oh, and it's worth bearing in mind that is just a constant, so: - i.e: you're adding the number to itself times.
5. (Original post by Zacken)
Oh, and it's worth bearing in mind that is just a constant, so: - i.e: you're adding the number to itself times.
It makes perfect sense now. Thank you!

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