Question

Let f(x) = x3 + 3x2 - 9x + 2. Then, f(x) has
(a) a maximum at x = 1
(b) a minimum at x = 1
(c) neither a maximum nor a minimum at x = -3
(d) none of these​

Answer 1

Answer:

Step-by-step explanation:

The given function has only local minimum value of f(x) at x = 1, and local maximum value of f(x) at x = - 3. In general, given function does not have minimum and maximum (see attachment).

I would choose option (d).

If you are in the classroom, you can tell a teacher your reason.

If you are in the front of computer .... you have to use your background, I mean check the similar problems in the textbook/workbook.