if u=$\displaystyle 3x^2y$ then whether it is a harmonic function for all values of x and y.
Follow Math Help Forum on Facebook and Google+
The function will be harmonic if $\displaystyle \displaystyle \begin{align*} \frac{\partial ^2 u}{\partial x^2}+\frac{\partial ^2 u}{\partial y^2} = 0 \end{align*}$.
View Tag Cloud