Question: Let r(t)=2t-4t.(a) Simplify the following difference quotient as much as possibler(th)-r(t)h=(b) Use your result from (a) and the limit definition of the derivative to calculater'(t)=limh0r(th)-r(t)h=(c)

Let r(t)=2t-4t.(a) Simplify the following difference quotient as much as possibler(th)-r(t)h=(b) Use your result from (a) and the limit definition of the derivative to calculater'(t)=limh0r(th)-r(t)h=(c) Use your answer from part (b) to evaluater'(1)=(d) Find the equation of the tangent line to the curve at the point (1,r(1)).y=

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