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Tangent lines

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Find an equation for the tangent line at the given curve at the point where x=x0;

a. y=(x^2+3x-1)(2-x); x0=1
b. y=x+7/5-2x; x0;=0

Find all points on the given graph of the given function where the tangent line is horizontal.

f(x)=(x-1)(x^2-8x+7)

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The solution shows how to find the equation of a tangent line to a function at a certain defined point.

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