Из равенства найдите значение b: (−9) × (−9) × (−9) × (−9) × (−9) = − ¹/₉ᵇ

  1. 5
  2. -6
  3. 6
  4. -5

📝 Detailed explanation

Запишем левую часть в виде степени: (−9)⁵ = −9⁵. Правая часть: −¹/₉ᵇ = −9⁻ᵇ. Из равенства: −9⁵ = −9⁻ᵇ ⇒ 5 = −b ⇒ b = −5.
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