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10 cards from this deck
Annuities
First instalment
Geometric progressions (GPs)
Derive within each question, don't memorise
a(rn−1)r−1\frac{a(r^n - 1)}{r - 1}r−1a(rn−1)
Common ratio (usually 1+1 +1+ interest rate)
Finding how long to reach target value
Round up to next whole number
Annual rate ÷ 12
Annual rate ÷ 52
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