SOLUTION: A sequence is defined recursively by f(1)=20 and fn=f(n-1)-4n find f(3)

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Question 1181257: A sequence is defined recursively by f(1)=20 and fn=f(n-1)-4n find f(3)
Answer by ikleyn(52775) About Me  (Show Source):
You can put this solution on YOUR website!
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        INSTRUCTION on how to make your first step



Simplify your task and make first step on your own, calculating f(2) with the formula.

For it, substitute n= 2 into the formula and use the value of 20 for f(1).