# I Differentiation notation

1. Oct 8, 2016

### Belgium 12

Hi members,

see attached PdF file.

What's the difference between d/dx and d/d(x^2) I don't understand this notation??

Thank You

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2. Oct 8, 2016

### Staff: Mentor

As far as I can see, the notation $\frac {\partial}{\partial a^2}$ means the partial (of something) with respect to $a^2$, where $a^2$ is being treated as its own variable.

3. Oct 8, 2016