Explain why the restriction is necessary in the power rule (read Desc)

Question

Explain why the restriction is necessary in the power rule ∫ x^n dx = [x^(n+1) / n+ 1] + C

Answer 1

The question does not include the restriction, but the usual restriction is

n ≠ -1

The simple reason that for n = -1 the right hand side would involve division by 0.

And ∫x^-1dx is indeed not a polynomial; instead it it ln(x).