[quote=@Plank Sinatra]
9x1=9
9x2=18
9x3=27
9x4=36
9x5=45
9x6=54
9x7=63
9x8=72
9x9=81
9x10=90
9x11=99
9x12=108

I'll play your games  Y O U   R O G U E S
[/quote]

f(x) = 3x^2 + 2x +108

f'(x) = 6x + 2

f"(x) = 6

f"'(x) = 0