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The Tangent

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(bron: wikipedia)

In geometry, the tangent line (or simply tangent) to a plane curve at a given point is the straight line that "just touches" the curve at that point. Leibniz defined it as the line through a pair of infinitely close points on the curve. More precisely, a straight line is said to be a tangent of a curve f(x)}} at a point c}} if the line passes through the point on the curve and has slope (c)}},... meer

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