Find the equation of the line tangent to

Arjun Dhaliwal

Arjun Dhaliwal

Answered question

2022-10-16

Find the equation of the line tangent to the given curve with the given slope. y = 2x^2-4x​, with tangent line of slope 4.

Answer & Explanation

Eliza Beth13

Eliza Beth13

Skilled2023-05-31Added 130 answers

To find the equation of the line tangent to the curve y=2x24x with a slope of 4, we need to determine the point of tangency and then use the point-slope form of a line.
First, let's find the derivative of the given curve to obtain the slope of the tangent line at any point on the curve. Taking the derivative of y=2x24x, we have:
dydx=ddx(2x24x)=4x4
Setting this derivative equal to the given slope of 4, we have:
4x4=4
Simplifying, we find:
4x=8
x=2
Now, to find the corresponding y-coordinate of the point of tangency, we substitute the value of x into the original curve equation:
y=2(2)24(2)
y=88
y=0
Therefore, the point of tangency is (2,0).
Now that we have the point of tangency, we can use the point-slope form of a line to find the equation of the tangent line. The point-slope form is given by:
yy1=m(xx1)
where (x1,y1) is a point on the line and m is the slope of the line.
Plugging in the values, we have:
y0=4(x2)
Simplifying, we find:
y=4x8
Therefore, the equation of the line tangent to the curve y=2x24x with a slope of 4 is y=4x8.

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