when you find critical values. do you plug them into the original equation or the derivative?

Question

anonymous · Answer

Original equation to find the max/min.

anonymous · Answer

thanks

zepdrix · Answer

plug them in for what purpose?

to find max/min you plug in "test points", values to the left and right of each critical point to determine increasing/decreasing.
You plug them into the derivative function.

zepdrix · Answer

If you already have determined increasing/decreasing, then plugging the critical point into the original function will give you the coordinate of your max/min.

You need to be more specific in what you're trying to do :3

anonymous · Answer

i mean... that guy understood it....

zepdrix · Answer

...

anonymous · Answer

depends on what you're trying to accomplish