At what point

  • #1
PrudensOptimus
641
0
At what point is the tangent to f(x)=x^2 + 4x - 1 horizontal?

How do you do that? I think it's asking me at what point is x = 0, or undefined, right??
 

Answers and Replies

  • #2
Hurkyl
Staff Emeritus
Science Advisor
Gold Member
14,967
19
Hint:

What is the unique feature about the equation of a horizontal line?
How does that relate to tangent lines?
 
Last edited:
  • #3
mathman
Science Advisor
8,078
547
Horizontal tangent is where derivative=0, that is x=-2.
 

Suggested for: At what point

Replies
29
Views
539
Replies
10
Views
520
  • Last Post
Replies
0
Views
397
Replies
6
Views
979
  • Last Post
Replies
8
Views
1K
Replies
2
Views
619
Replies
1
Views
130
Replies
4
Views
286
Replies
38
Views
441
Top