Mathematics is a field of study that deals with numbers, shapes, and patterns.
$\begingroup$ which oddly enough is true for the majority of analytic elementary functions -- This is true for an analytic function iff it has real coefficients in its Taylor series (as can easily
Solve[a b I/(a + b I) == 4 - 2 I, {a, b},Reals]. Is there a simple way of getting Mathematica to solve this, without knowing lots of special Mathematica commands? In searching out the answer on
Mathematics is a field of study that deals with numbers, shapes, and patterns.
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In order to determine what the math problem is, you will need to look at the given information and find the key details. Once you have found the key details, you will be able to work out what the problem is and how to solve it.
Simplify [expr ∈ Reals, assum] can be used to try to determine whether an expression corresponds to a real number under the given assumptions. ( x 1 | x 2 | ) ∈ Reals and { x 1 , x 2 } ∈ Reals test whether all x i are real numbers.
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OP asked in Mathematica, it got migrated here. David Richerby said it should be migrated to Computational Science, you say it should be migrated to SO. Meanwhile, I actually answered