Answer:
yayyyy!!!
Step-by-step explanation:
thanks that's very generous
The answer is B, picture shows how to solve it although the answer is written slightly different
My best bet would be A but i'm not 100 Percent sure, Hope it helps :)
F(4)=(4-1)+2*4=11...
This seems a bit too easy though, did you mean f(n)=f(n-1)+2n ? In this case :
f(1)=16
f(2)=16+2*2=20
f(3)=20+2*3=26
f(4)=26+2*4=34