Question

The table shows values of n and f(n) for the equation f(n) =
n(n+3)
2.
f(n)
1
2
2
5
3
9
4
?
What is the value of f(n) when n =
= 42
A 12
B. 13
C. 14
D. 28
E

Answer 1

I looked at the the picture and the answer is A. 12

I guess the 2 was supposed to be a question mark judging by the picture...