This is what I want. Can you please help me?
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2
$f(x,y)=
\begin{cases}
\frac{x^3}{x^2+y^2} & (x,y)\ne(0,0), \\
0 & (x,y)=(0,0).
\end{cases}
$
$f(x,y)= \begin{cases} \frac{x^3}{x^2+y^2} & (x,y)\ne(0,0), \\ 0 & (x,y)=(0,0). \end{cases} $
See also: the corresponding answer in the MathJax basic tutorial and quick reference.
answered Apr 16 '20 at 16:53
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$\begingroup$ Maybe add "\displaystyle" before the "\frac"? $\endgroup$ – Barry Cipra Apr 16 '20 at 17:08
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2$\begingroup$ Or
\dfrac. That's all probably matter of taste. (Not really the heart of the matter here, the OP asked mainly about the "cases" part.) $\endgroup$ – Martin Sleziak Apr 16 '20 at 17:10
