Plz Help (1 Viewer)

[BzR_My]

Please, help me with this question.

Find the points on the parabola f(x)=2x^2-6x+4 where the tangent is parallel to the line f(x)=6x+4
b) Hence find the equation of the tangent
Thanks.

 

[Silly Sausage]

Let f(x)=6x+4 =f1(x)
Let f(x)=2x^2-6x+4 =f2(x)


Find the gradient of f1(x)
Find f2'(x)
Let f2'(x)=gradient of f1(x)

Solve for x
Substitute x into f2(x) for y value
Use the (y-y1)=m(x-x1) formula to find equation of tangent

 

[Kaido]

OP, prob better to rename your functions since you have two f(x) with different equations lol

 

[BzR_My]

Haha, Will do..


Thanks for your help guys. /close