Saturday
October 25, 2014

Homework Help: math

Posted by Pd on Sunday, July 11, 2010 at 2:17pm.

f(x)=-x^3+3x^2+9x-5

asked to find the stationary points this was my working and i don't know if it is correct

f dash of x = -3x^2+3(2x)+9
-3x^2+6x+9

at local max and min f(x) should =0

-3x^2+6x+9=0
3x^2-6x+9
x^2-2x+3=0

stationary points would be at (x+3) (x-3)
but am i right... if not a nudge in the right direction would be a great help

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math - need to classify to stationary points as local minimum and local maximum ...
Differentiation - Again, that all makes sense. Thank you very much. Thank you ...
Math (Bob Pursley - i asked about stationary points which came out at (x-3) and...
Math - find any stationary points of the function g(x) = (2x-3)square root of 5+...
Calculus - Find any absolute max/min and local max/min for the function f(x)=x^3...
Calculus - Find the values for which f(x) = x^10-10x and if 0 (less than or ...
Calculus - You wont get it - Find the local max and local min and saddle points ...
calculus - Find the correct values for the equation -x^3 +bx^2 +cx + d, using ...
math - this question concerns the function f(x)=-2x3+3x2+12x+10 (a)find the ...
calculus - a function has a local maximum at x=-2 and x=6 and a local minimum at...

Search
Members