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	Let f be a differentiable function, defined for all real numbers x with the following properties. 

f’(x) = ax^2 + bx
f’(1) = 6 and f’’(1) = 18
 integral 1 to 2 of f(x) dx = 18 


	6=-a+18
12= a 


2ax + b 

18 = 2a + b 

b = 18-2a  

18 = 24 + x 

b= -6 

12x^2 -6x 

4x^3-3x^2+C 


=8....+ 10 c=10