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Question: Identifying an assumed variable

Question:Identifying an assumed variable

Michael 222 Maple
assumptions
October 20 2006
0
Hi: In one part of my calculation, I need to assume some properties for a variable; later on, the assumption is no longer needed so I clear the variable. After that, I cannot manipulate any of the previously calculated expressions containing that same variable. Here is an example. How do I get around this? I really need to clear the variable for other reasons. Thanks Mike restart;assume(n>0); > test:=-5/81*n^5+b*n^4+c*n^3+d*n^2+e*n+f; 5 5 n~ 4 3 2 test := - ----- + b n~ + c n~ + d n~ + e n~ + f 81 > n:='n'; n := n > > coeff(test,n,5); 0 > op(1,test)/n^5; 5 5 n~ - ----- 5 81 n > subs(n=N,test); 5 5 n~ 4 3 2 - ----- + b n~ + c n~ + d n~ + e n~ + f 81
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