(a) The curve y = 1/(1 + x²) is called a witch of Maria Agnesi. Find an equation of the tangent line to this curve at the point (1,¹). y = (b) Illustrate part (a) by graphing the curve and tangent line on the same screen. y 2.0 -4 -4 -2 -2 1.5 1.0 0.5 -0.5 -1.0 y 2.0 1.0 0.5 -0.5 2 2 4 X -4 -4 -2 y 2.0 1.5 0.5 -0.5 -1.0 y 2.0 1.5 10 0.5 -0.5 2 2

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