- #1
DizzyDoo
- 13
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[SOLVED] Basic Differentiation
Hi there, I've heard that this forum is the best for getting some quick help.
Find the gradient of the tangent to the curve at the given point:
y = 2x² + 3x + 5 when x = -1
Right, I'm very new a this, but dy/dx is the way to go right?
3. The Attempt at a Solution :
y = 2x² + 3x + 5 when x = -1
dy/dx it, and I get:
dy/dx=4x + 3
Substitute -1 in and I get
y=-1
So I've now got two points; (-1,-1) but that's not the gradient, but I've got the feeling I'm half way there. Any help would be great thanks!
Hi there, I've heard that this forum is the best for getting some quick help.
Find the gradient of the tangent to the curve at the given point:
y = 2x² + 3x + 5 when x = -1
Homework Equations
Right, I'm very new a this, but dy/dx is the way to go right?
3. The Attempt at a Solution :
y = 2x² + 3x + 5 when x = -1
dy/dx it, and I get:
dy/dx=4x + 3
Substitute -1 in and I get
y=-1
So I've now got two points; (-1,-1) but that's not the gradient, but I've got the feeling I'm half way there. Any help would be great thanks!