What is the equation of the normal to y= (x^2 + 3) / (x+1) at (1,2)?
the answer is x =1 but I don't get why.
I know that the slope is 0 (after substituting 1 into the derivative equation), so to find the normal of that slope, isn't it 0 also? I ended up with y=2, which is wrong..

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I know it's vertical but how do you find the vertical slope? :S

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