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Sections
Arithmetic Progressions
Pick a section. You read the idea first, then answer questions on it.
1. A constant step
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2. Before you start
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3. The common difference of an AP
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4. The general form of an AP
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5. Testing whether a list is an AP
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6. Finite and infinite APs
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7. The nth term formula
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8. The sum of the first n terms
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9. How a term and a sum are related
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10. Finding a and d from two given terms
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11. The rth term from the end
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12. A term is not the same as a sum
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13. Worked: checking whether a list is an AP
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14. Worked: deriving the nth term formula
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15. Worked: a starting-salary application
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16. Worked: finding a and d from two terms
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17. Worked: a term counted from the end
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18. Worked: deriving the sum formula
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19. Worked: a savings application of the sum
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20. Worked: how many terms give this sum
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21. Recap
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22. Where you will meet this
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23. Practice set: Exercise 5.1
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24. Practice set: Exercise 5.2
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25. Practice set: Exercise 5.3
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26. Practice set: Exercise 5.4 (Optional)
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