(a) Find the slope of the tangent line to the curve y=x^{3}-4x+1 at the point where x=a .

(b,c) Find the equations of the tangent lines at the points

(b)(3, 16) and (c) (-5, -104) .

(a)

(b)

(c)

(b,c) Find the equations of the tangent lines at the points

(b)

(a)

(b)

(c)

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