# C1 question

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#1
I'm having some difficulty with this question (no. 7) any help would be greatly appreciated

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1
6 years ago
#2
could I just point out that's C2 not C1
0
6 years ago
#3
So what would the terms of your series be?
0
6 years ago
#4
(Original post by That_average_guy)
I'm having some difficulty with this question (no. 7) any help would be greatly appreciated

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Write out the first few terms.

What's a and what's d?

Then, you can sub into the AP formula and get an equation to solve in terms of n.

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6 years ago
#5
hope this helps..

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6 years ago
#6

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6 years ago
#7
(Original post by fluctuationsman)
could I just point out that's C2 not C1
For your exam board that is C2. For edexcel that is a C1 question. Exam boards vary.
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6 years ago
#8
(Original post by fluctuationsman)
could I just point out that's C2 not C1
That's C1, the C2 version of that is to prove the sum of a Geometric series, not the arithmetic series.
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6 years ago
#9
That's C1, the C2 version of that is to prove the sum of a Geometric series, not the arithmetic series.
I'm doing OCR mei maths, there are no sequences in C1 fortunately!
0
6 years ago
#10
(Original post by fluctuationsman)
I'm doing OCR mei maths, there are no sequences in C1 fortunately!
Oh okay!
actually I like sequences, they are quite logical in my opinion.
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#11
C1 is non-calculator though so doing the quadratic formula would be difficult?

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6 years ago
#12
(Original post by That_average_guy)
C1 is non-calculator though so doing the quadratic formula would be difficult?

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Yep, it would be very difficult , my board is OCR and this question would be on a calculator C2 paper. I'm guessing you either would get a question with a simple quadratic or use another method do get the answer.

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#13
Ah ok fair enough, thanks for the help!

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