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Question: Problem manipulating the D operator

Question:Problem manipulating the D operator

lemelinm 1535 Maple
July 31 2008
0

Hi everybody,

> F := t -> 1+x(t)^2+t^3 ;
                                            2    3
                          F := t -> 1 + x(t)  + t 
> D[1](F)(1);

                             2 x(1) D(x)(1) + 3

Now, knowing that x(1)=-4 and D(x)(1)=F(1), I need to make those substitutions in the last output.

Any ideas?

Thanks in advance

Mario
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