What is the equation of the normal line to the curve y = x^2 + 2x - 1 at a point (1,2) can anyone here do this thanks
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Originally Posted by rcs What is the equation of the normal line to the curve y = x^2 + 2x - 1 at a point (1,2) can anyone here do this thanks The tangent line at (1,2) has the same gradient as the curve at the point (1,2). What function tells you the gradient of a curve? The normal line is perpendicular to the tangent line. What property do perpendicular lines have?
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