How Do You Determine the T-line and N-line for f(x) = x*sqrt(5-x) at x = -4?

[Chocolaty]

Here's the question:
Given: f(x) = x*sqr(5-x)
Find: the equation (ax + by + c = 0) of T-line and N-line at x = -4

What's an N-line?

 

[Kamataat]

Never heard of those terms, but if T-line is the tangent then N-line is the normal line (the line perpendicular to the tangent at x=-4) I suppose.

- Kamataat

 

[matt grime]

it's your course, it's your definition, ask your teacher.