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# What proofs do we need to learn for C1 & C2 Edexcel? watch

1. Just wondering which ones we need to learn for C1 and C2

Eg. proof for sum of positive integers, quadratic equation proof?
2. C1 proof of sum of arithmetic series C2 proof of sum of geometric series are the most likely for edexcel
3. I believe you do need to know the proof for the arithmetic sum formula - not sure about the quadratic one (this is on Edexcel).
4. (Original post by Robbie242)
C1 proof of sum of arithmetic series C2 proof of sum of geometric series are the most likely for edexcel
Just these two formulas. Only its the other way round, but you get what I mean.

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5. (Original post by MashB)
Just these two formulas. Only its the other way round, but you get what I mean.

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Nope pretty sure they won't ask you for sum of a geometric series in edexcel C1, as the topic for edexcel C1 is arithmetic series
6. (Original post by Robbie242)
Nope pretty sure they won't ask you for sum of a geometric series in edexcel C1, as the topic for edexcel C1 is arithmetic series
Awkward... Looks like I myself have got it the wrong way round. My apologies guys

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I doubt it. Besides, it's more GCSE level than A-level
9. (Original post by L1000)
Just wondering which ones we need to learn for C1 and C2

Eg. proof for sum of positive integers, quadratic equation proof?

proof that c4 is actually a bomb in the teacher's briefcase

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