English
If a rational q is formed as mkRat num den, then q^n = mkRat (num^n) (den^n).
Русский
Если рацион q задан как mkRat num den, то q^n = mkRat (num^n) (den^n).
LaTeX
$$$\left(\dfrac{num}{den}\right)^n = \dfrac{num^n}{den^n}$$$
Lean4
@[simp]
theorem mkRat_pow (num den : ℕ) (n : ℕ) : mkRat num den ^ n = mkRat (num ^ n) (den ^ n) := by
rw [mkRat_eq_divInt, mkRat_eq_divInt, divInt_pow, Int.natCast_pow]