SOLUTION: If f(1) = 7 and f(n) = f(n - 1) + 2 then find the value of f(4).

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Question 1198827: If f(1) = 7 and f(n) = f(n - 1) + 2 then find the value of f(4).
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
.

First calculate f(2), using the given formula.


Next calculate f(3).


Finally, calculate f(4).



Alternatively, you may notice that the formula defines arithmetic progression 
with the 1st term  a(1) = 7 and the common difference  d = 2.


Then a(4) = a(1) + (4-1)*2,


and you can compute it mentally.