Slope of the tangent line of an intersection - Directional Derivatives

In summary, the slope of the tangent line of an intersection is the rate of change of a function at a specific point where two curves intersect. It can be calculated using the derivative of the function and is significant in understanding the behavior of the function at that point. It is also equivalent to the directional derivative in the direction of the tangent line and can be visualized as a line on a graph touching the curve at the point of intersection.
  • #1
RaoulDuke
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Homework Statement


Find the slope of the tangent line to the curve of intersection of the vertical plane x - y + 1 =0 and the surface z = x2+y2 at the point (1, 2, 5)


Homework Equations


Gradients, Cross products


The Attempt at a Solution



I'm pretty lost here. I think I have to cross the two gradients of the functions that I have to find the intersection at (1, 2, 5). However, what then?
 
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  • #2
how about finding the horizontal direction of the plane, then using it to find the directional derivative...
 

What is the slope of the tangent line of an intersection?

The slope of the tangent line of an intersection is the rate of change of a function at a specific point where two curves intersect. It represents the direction and steepness of the curve at that point.

How is the slope of the tangent line of an intersection calculated?

The slope of the tangent line can be calculated using the derivative of the function at the point of intersection. This is done by finding the derivative using the limit definition of a derivative or by using differentiation rules.

What is the significance of the slope of the tangent line of an intersection?

The slope of the tangent line of an intersection is important because it helps us understand the behavior of a function at a specific point. It can also be used to find the maximum and minimum values of a function at that point.

What is the relationship between slope of the tangent line and directional derivatives?

The slope of the tangent line is equivalent to the directional derivative in the direction of the tangent line. In other words, the slope of the tangent line represents the rate of change of the function in the direction of the tangent line at the point of intersection.

How can the slope of the tangent line of an intersection be visualized?

The slope of the tangent line can be visualized as a line that touches the curve at a specific point and represents the direction and steepness of the curve at that point. This can be seen on a graph of the function where the tangent line is drawn at the point of intersection.

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