Пошаговое объяснение:
1/9² = 1/9 * 1/9 = 1/81
4 - 1/81 - 1/9 - 1/9 + 1 =
3. 81/81 - 1/81 - 9/81 - 9/81 + 1 =
3. 80/81 - 9/81 - 9/81 + 1 =
3. 71/81 - 9/81 + 1 =
3. 62/81 + 1 = 4. 62/81
Пошаговое объяснение:
1/9² = 1/9 * 1/9 = 1/81
4 - 1/81 - 1/9 - 1/9 + 1 =
3. 81/81 - 1/81 - 9/81 - 9/81 + 1 =
3. 80/81 - 9/81 - 9/81 + 1 =
3. 71/81 - 9/81 + 1 =
3. 62/81 + 1 = 4. 62/81