📈 指數計算機

aⁿ = a × a × ... × a(共 n 個)
a⁻ⁿ = 1/aⁿ  a⁰ = 1(a ≠ 0)

指數定律:aᵐ×aⁿ = aᵐ⁺ⁿ  (aᵐ)ⁿ = aᵐⁿ  a⁻ⁿ = 1/aⁿ