bumblebee123
Junior Member
- Joined
- Jan 3, 2018
- Messages
- 200
I don't think I properly understand this question. Would anyone be able to help?
question: for a curve dy/dx = 3x^2 + 75 Determine how many turning points the curve has
I thought that the turning points would be when the gradient = 0, so 0 = 3x^2 + 75 this means, to solve for x, 3( x^2 + 25 ) however this would give me x = sqrt -25
but negative numbers cannot be square rooted. This means x = 0.
the answer says that it has 0 turning points. Why is this?
any help would be really appreciated
question: for a curve dy/dx = 3x^2 + 75 Determine how many turning points the curve has
I thought that the turning points would be when the gradient = 0, so 0 = 3x^2 + 75 this means, to solve for x, 3( x^2 + 25 ) however this would give me x = sqrt -25
but negative numbers cannot be square rooted. This means x = 0.
the answer says that it has 0 turning points. Why is this?
any help would be really appreciated