In order to subtract fractions, you need the denominators (bottom number) to be the same. 
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$100000 for 3 years at 9% compounded annually
1 answer:
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Answer:
f(n)= 5 · 4
Step-by-step explanation:
You use the explicit formula for geometric sequence. The five is the firat term and is placed correctly. The 4 is the rate of change, because if you multiply 5 by 4 you get 20 and so on.