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Question: Heat equation graph

Question:Heat equation graph

b000t 10 Maple
homework plot3d
December 05 2017
2

u:=(x,t)->(40/Pi)*sum((1/r)*sin(r*Pi*x/2)*exp(-lambda^2*t),r=1....infinity);     r=1,3,5.... 

this is one dimensional heat equation solution. r values must be odd numbers and we can take the random r variable like 1000 .x=0...2 and t=0...1   but I don't know how can I draw 3d plot. If I write plot3d([u(x,t)],x=0...2,t=0...1); give an error.(bad range arguments)
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