how can I define some variable as a real variable?
I want to define a variable like (d) as a Real variable and then using that in the other equation like that:
d is Real
but Mathematica software gives me this result
d \[Element] Reals;
f = d (1 + I) + 5; Re[f]
5 + Re[(1 + i) d]
but this should be
now what should I do to solve this problem
best regards Hakan
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