- #1
lightlightsup
- 95
- 9
- Homework Statement
- I've been warned by a professor to not do u-substitution like this unless du is a constant (ex: a number, like du = 4 dx).
But, if g'(x) is a variable like x^2, I shouldn't use division like this due to division by zero issues?
I know that du can directly replace g'(x)dx in many cases.
But, is division really wrong here?
Any book references on this?
- Relevant Equations
- See image.