# Question:RootOf interpretation

## Question:RootOf interpretation

Maple

I was hoping to find a nice symbolic solution for the root of this equation:

a,c,d,k are parameters.
Unfortunately, I got an RootOf expression, which does not make sense to me. Assumptions do no help me further.

Next week, I have to present my results, but I don't know how to interpret is (the help file does not bring any relief). Is there something to say about the root? Suppose, I wanted to use side restriction on a problem? E.g., find a solution conditional on the fact that the derivative is zero.

Clearly, in the plot it seems simple.

In one case there is a solution Maple provides: a  (a parameter)

This seems strange, because numerically there is one solution (and clearly not a).

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 User Interface: 1502365          Kernel: 1502365         Library: 1502365
 (1)
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 (2)
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 Originally a, renamed a~:   is assumed to be: RealRange(Open(0),infinity) Originally k, renamed k~:   is assumed to be: RealRange(Open(0),infinity) Originally t, renamed t~:   is assumed to be: RealRange(Open(0),Open(21))
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 (3)
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 (4)
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 (5)
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 (6)
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 (7)
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 (8)

Now, numerically:

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 (9)
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 (10)
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