Math Problem Statement

at what point on the graph of f(x) = x^2-4 is the tangent line parallel to the line 6x-3y=2

Solution

To find the point on the graph of f(x)=x24f(x) = x^2 - 4 where the tangent line is parallel to the line 6x3y=26x - 3y = 2, follow these steps:

Step 1: Determine the slope of the given line.

The equation of the line is 6x3y=26x - 3y = 2. To find the slope, rewrite this equation in slope-intercept form y=mx+by = mx + b, where mm is the slope.

6x3y=26x - 3y = 2

Divide the entire equation by 3:

2xy=232x - y = \frac{2}{3}

Now, solve for yy:

y=2x23y = 2x - \frac{2}{3}

So, the slope mm of the line is 22.

Step 2: Find the derivative of f(x)f(x).

The derivative of f(x)=x24f(x) = x^2 - 4 gives the slope of the tangent line at any point xx.

f(x)=2xf'(x) = 2x

Step 3: Set the derivative equal to the slope of the line.

We want the slope of the tangent line f(x)f'(x) to be equal to 2 (the slope of the given line).

2x=22x = 2

Solve for xx:

x=1x = 1

Step 4: Find the corresponding yy-coordinate.

Substitute x=1x = 1 back into the original function f(x)=x24f(x) = x^2 - 4 to find the yy-coordinate.

y=124=14=3y = 1^2 - 4 = 1 - 4 = -3

Conclusion:

The point on the graph of f(x)=x24f(x) = x^2 - 4 where the tangent line is parallel to the line 6x3y=26x - 3y = 2 is (1,3)(1, -3).

Would you like further details or have any questions?

Here are 5 related questions:

  1. How do you find the slope of a tangent line to any curve?
  2. What does it mean for two lines to be parallel in terms of their slopes?
  3. How do you find the equation of the tangent line at a given point on a curve?
  4. What is the significance of the derivative in determining the slope of a curve?
  5. Can a function have more than one tangent line parallel to a given line?

Tip: Remember that the slope of a tangent line at any point on a curve is given by the derivative of the function at that point.

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Math Problem Analysis

Mathematical Concepts

Derivatives
Slope of a tangent line
Quadratic functions

Formulas

Derivative formula
Slope formula

Theorems

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Suitable Grade Level

Grades 10-12