Question: Why changing the digit environment affects the solution of an equation?

March 13 2014 freestone023 10

I am a begnnier of Maple. I have got some problems when solving the economic maximization problem.

When I set Digits:=15, then I could solve the problem and the solve command will give me the answer.

But when I set Digits:=20, it seems Maple cann't give me a numerical solution even I put restrictions on the form of solutions.

Can anybody help me about this?

Thank you!

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