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Exam (elaborations)
A-LEVEL OCR 2024 MATHEMATICS A PAPER 1 MARK SCHEME
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32
March 2025
2024/2025
A+
A-LEVEL OCR 2024 MATHEMATICS A PAPER 1 MARK SCHEME
- Sn = n/2 (2a + (n-1)d)
- Sn = n/2 (a + l) where a is the first term and l is the last term - Correct Answer--formula of an arithmetic series
the sum of the terms of an arithmetic sequence - Correct Answer--what is an arithmetic series
- Un = a + (n-1)d
- a = the first term
- d = the common difference - Correct Answer--nth term of an arithmetic sequence
- Un = ar^(n-1)
- a = first term
- r = common ratio - Correct Answer--nth ter...
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