Ex 2.11
20) a curve y''=12x-24 and a stationary point at (1,4). evaluate y when x=2.

So, dy/dx=0 at the point (1, 4) - that is where x=1 and y=4.





But when x=1, f'(x)=0, therefore:





Now:





Now when x=1, y=4:





Now when x=2,



So when x=2, y=0.

Does the problem say y=x+4?