P1_3
> | restart; |
> | plot(x*exp(x),x=-6..1); |
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> | solve(diff(x*exp(x),x),x); |
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(1) |
> | solve(diff(x*exp(x),x$2),x); |
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(2) |
> | eval(x*exp(x),x=-1); |
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(3) |
> | eclambert:=x=a*exp(-x); |
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(4) |
> | dx:=implicitdiff(eclambert,x,a); |
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(5) |
> | cond:=a*dx/x; |
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(6) |
> | cond:=subs(a*exp(-x)=x,cond); |
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(7) |
> | cond:=algsubs(a*exp(-x)=x,cond); |
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(8) |
> |
> |