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Which should model total production across several periods: unu_nun or SnS_nSn?
A
1−p1001-\frac{p}{100}1−100p
B
For r≠1r\neq1r=1, the geometric sum is Sn=a(1−rn)1−r\boxed{S_n=\frac{a(1-r^n)}{1-r}}Sn=1−ra(1−rn).
C
un+1=1.03(un+120)u_{n+1}=1.03(u_n+120)un+1=1.03(un+120)
D
Use the series sum SnS_nSn.
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1.6.17 Sequences and series in modelling (A-level only) Flashcards
20 flashcards on OCR (MEI) A Level Maths 1.6.17 Sequences and series in modelling (A-level only): the key formulae, methods and definitions you need to recall for Component 01, Component 02 and Component 03.