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# FP1 Series Question... Need help please..

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1. I can do part a and part b correctly, but can't find do part C
I can use the answer from part B but I can't see the connection between A and C and can't get the correct answer
2. (Original post by Oliviazh)

I can do part a and part b correctly, but can't find do part C
I can use the answer from part B but I can't see the connection between A and C and can't get the correct answer
Well you could just expand the quadratic and do 3 different sums. Can't go wrong with that.
3. i don't really think you need to use part a) for part c)

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4. (Original post by the bear)
i don't really think you need to use part a) for part c)

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Just an off-topic question; why do you always put asterisks on everything you write?? lol
5. (Original post by RDKGames)
Well you could just expand the quadratic and do 3 different sums. Can't go wrong with that.
Well I did that but still wrong answer...must be something wrong with the calculation
6. (Original post by Oliviazh)
Well I did that but still wrong answer...must be something wrong with the calculation
Why are you using a calculator?? I mean, you're allowed yeah, but for what? There's nothing to calculate. You're probably factoring wrong. Show your working if you get stuck

So

The first term you can say that and use the result from part b.
7. (Original post by RDKGames)
Why are you using a calculator?? I mean, you're allowed yeah, but for what? There's nothing to calculate.

So

The first term you can say that and use the result above.
Um..I didn't use a calculator...I mean there must be something wrong with my calculation😂
Just a quick question, for the last term in your equation, does the result of that part equal to 1 or n?
8. (Original post by Oliviazh)
Um..I didn't use a calculator...I mean there must be something wrong with my calculation😂
Just a quick question, for the last term in your equation, does the result of that part equal to 1 or n?
Misread but there's still no calculation anyway lol. And yes. You are summing up 1 and amount of times so it's 1*n hence n.
9. (Original post by RDKGames)
Yes. You are summing up 1 and amount of times so it's 1*n hence n.
Thank you😃
10. Meh, the above is overkill.

Better to think of it as summing the odd terms up till 2n-1, you know the sum of all terns from 1 to 2n and you know the sum of even terms from 1 to 2n. So the sum of all terms - sum of even terms (i.e: part a - part b) gets you what you want.
11. (Original post by RDKGames)
Just an off-topic question; why do you always put asterisks on everything you write?? lol
i don't.... it's some kind of bug which afflicts people with 12 gems ?

the TSR techies are baffled

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Updated: September 25, 2016
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