Edexcel A Level Maths: Pure:復習筆記4.6.1 Modelling with Sequences & Series
Modelling with Sequences & Series
What do I need to know about modelling with sequences and series?
- Many real-life situations can be modelled using sequences and series
- If a quantity is changing repeatedly by having a fixed amount?added?to or?subtracted?from it then the use of?arithmetic sequences?and?arithmetic series?is appropriate
- If a quantity is changing repeatedly by a fixed?percentage,?or by being?multiplied?repeatedly by a fixed amount, then the use of?geometric sequences?and?geometric series?is appropriate
Exam Tip
- Remember, an exam question won't always tell you to use sequence and series methods, so you've got to be able to spot 'hidden' sequence and series questions.
- To help you do this, be suspicious of questions about savings accounts, salaries, sales commissions, profits and the like – these are often sequence and series questions in disguise!
Worked Example
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