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(50*e^(-0.2*x))'The calculation above is a derivative of the function f (x)
(50)'*e^(-0.2*x)+50*(e^(-0.2*x))'
0*e^(-0.2*x)+50*(e^(-0.2*x))'
0*e^(-0.2*x)+50*e^(-0.2*x)*((-0.2*x)'*ln(e)+(-0.2*x*(e)')/e)
0*e^(-0.2*x)+50*e^(-0.2*x)*((-0.2*x)'*ln(e)+(-0.2*x*0)/e)
0*e^(-0.2*x)+50*e^(-0.2*x)*(((-0.2)'*x-0.2*(x)')*ln(e)+(-0.2*x*0)/e)
0*e^(-0.2*x)+50*e^(-0.2*x)*((0*x-0.2*(x)')*ln(e)+(-0.2*x*0)/e)
0*e^(-0.2*x)+50*e^(-0.2*x)*((0*x-0.2*1)*ln(e)+(-0.2*x*0)/e)
0*e^(-0.2*x)+50*e^(-0.2*x)*((-0.2*x*0)/e-0.2*ln(e))
0*e^(-0.2*x)+50*e^((-0.2)'*x-0.2*(x)')
0*e^(-0.2*x)+50*e^(0*x-0.2*(x)')
0*e^(-0.2*x)+50*e^(0*x-0.2*1)
0*e^(-0.2*x)+50*0^(-0.2*x)
0*e^(-0.2*x)+50*-0.2*e^(-0.2*x)
-10*e^(-0.2*x)
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