y = a + b x;
I can understand this output of the ordinary differentiation of
D[ y, x]
but I don't understand the mathematical meaning of this output
a + b x
In fact there is no matching usage of
D[f] (with only single argument) in the Mathematica documentation. Usually Mathematica will flag up argument count mismatch when running, e.g.
"... called with m argument; n arguments are expected"
Can anyone help me to understand the meaning of
Is this a bug or undocumented behavior in Mathematica?