2021-001

Choose the incorrect alternative below. Note: \( (f(x))' \) indicates the derivative of \( f(x) \).

1. \( (x^4)' = 4 x^3 \)
2. \( (x^{10})' = 10x^9 \)
3. \( (x^{-2})' = -2x^{-1} \)
4. \( (x^{-3.5})' = -3.5x^{-4.5} \)
5. none of the above

 

Original idea by: Joao Meidanis