Question

Is the product rule for derivatives
f'(x)g(x)+f(x)g'(x) or
f(x)g'(x)+f'(x)g(x)

Answer 1

yep

Answer 2

Which one is correct?

Answer 3

Both

Answer 4

Call:
\[A=f'(x)g(x); B=f(x)g'(x)\]
Do you agree that \[A+B=B+A\] (for scalar functions).
If yes, then you have your answer...