## How do you find the equation of a line that is tangent to a curve?

1) Find the first derivative of f(x). 2) Plug x value of the indicated point into f ‘(x) to find the slope at x. 3) Plug x value into f(x) to find the y coordinate of the tangent point. 4) Combine the slope from step 2 and point from step 3 using the point-slope formula to find the equation for the tangent line.

## For what value of k for G x 1/4 − x K is GA normal to f/x x2 +1 hint you know the slope !)?

Explanation: A tangent can only occur when the two lines have a common point. Consider that at the tangential point they both have the same coordinates. Now solve as simultaneous equations.

**What is the derivative of KX 2?**

By the Sum Rule, the derivative of k−x2 k – x 2 with respect to x x is ddx[k]+ddx[−x2] d d x [ k ] + d d x [ – x 2 ] . Since k k is constant with respect to x x , the derivative of k k with respect to x x is 0 0 .

### What is K in calculus?

y = kx. where k is the constant of variation. Since k is constant (the same for every point), we can find k when given any point by dividing the y-coordinate by the x-coordinate. For example, if y varies directly as x, and y = 6 when x = 2, the constant of variation is k = = 3.

### How do you find normal and tangent?

The normal line is defined as the line that is perpendicular to the tangent line at the point of tangency. Because the slopes of perpendicular lines (neither of which is vertical) are negative reciprocals of one another, the slope of the normal line to the graph of f(x) is −1/ f′(x).

**How do you find the equation of tangent to a curve?**

To determine the equation of a tangent to a curve: Find the derivative using the rules of differentiation. Substitute the (x)-coordinate of the given point into the derivative to calculate the gradient of the tangent.

## What is x2 + y2 – 6x – 10Y + k = 0?

The circle x2 + y2 − 6x − 10y + k = 0. does not touch or intersect the co-ordinate axes and the point (1,4) is inside the circle. find the ranges of the values of k. S = x2 + y2 – 6x – 10y + k = 0.

## How do you substitute a tangent for a straight line equation?

Substitute \\ (x = – ext {1}\\) into the equation for \\ (g’ (x)\\): Substitute the gradient of the tangent and the coordinates of the point into the gradient-point form of the straight line equation.

**How to find the gradient of the tangent of a point?**

Use the rules of differentiation: To determine the gradient of the tangent at the point \\ (\\left (1;3ight)\\), we substitute the \\ (x\\)-value into the equation for the derivative. Substitute the gradient of the tangent and the coordinates of the given point into the gradient-point form of the straight line equation.