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Question: Plot warnning. unable to evaluate the function to numeric values in the region;

Question:Plot warnning. unable to evaluate the function to numeric values in the region;

nufeng 0 Maple 15
plot
September 15 2012
0

Hello, everyone.

How to plot 

plot(-(2*(e-1))*exp(-3*x)/exp(-3)+(3*e-2)*exp(-3*x)*x/exp(-3)) 

this function is the answer of ODE: 

ode1c := diff(f(x), x, x)+6*(diff(f(x), x))+9*f(x)

ics := f(1) = exp(1), (D(f))(1) = -2

 

I got a warnning : "

Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct

"

Thanks in advance!
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