Definitions If the curve is the graph of y = f (x) tangent to the curve at the point P (x, y) is any point in a straight line through P and has a slope equal limh → 0f (x + h) -f. (x) h (If the limit values are) , the slope of the curve at the point P (x, y) represents the slope of the tangent to the curve at the point P.
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