Core 1 OCR-Differentiation
Find the equation of the normal to the curve y=3x^2-2x-1 which is parallel to the line y=x-3.
So far I know the gradient of the line, 1. I also differentiated y=3x^2-2x-1 which is 6x-2. I then made it equal 1, 6x-2=1 and got an answer of 1/2x. I don't really know how to continue.
So far I know the gradient of the line, 1. I also differentiated y=3x^2-2x-1 which is 6x-2. I then made it equal 1, 6x-2=1 and got an answer of 1/2x. I don't really know how to continue.
(edited 8 years ago)
Original post by nerdygeek123
Find the equation of the normal to the curve y=3x^2-2x-1 which is parallel to the line y=x-3.
So far I know the gradient of the line, 1. I also differentiated y=3x^2-2x-1 which is 6x-2. I then made it equal 1, 6x-2=1 and got an answer of 1/2x. I don't really know how to continue.
So far I know the gradient of the line, 1. I also differentiated y=3x^2-2x-1 which is 6x-2. I then made it equal 1, 6x-2=1 and got an answer of 1/2x. I don't really know how to continue.
Sub the value of x=1/2 back into your original equation to get a value for y. Then use the y-y1=m(x-x1) formula to work out the equation
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