Homework Statement
Can someone please check my working, as I am new to Einstein notation:
Calculate $$\partial^\mu x^2.$$
Homework Equations
3. The Attempt at a Solution [/B]
\begin{align*}
\partial^\mu x^2 &= \partial^\mu(x_\nu x^\nu) \\
&= x^a\partial^\mu x_a + x_b\partial^\mu x^b \ \...