27. Oblicz: a) sqrt(9) * [(1, 5) ^ – 1 + 9 ^ (- 1, 5)] – 27 ^ (- 2/3) c) root(3, 0, 375) * root(3, 9) + (3 ^ – 1 – root(4, 16/81)) ^ – 2

27. Oblicz: a) sqrt(9) * [(1, 5) ^ – 1 + 9 ^ (- 1, 5)] – 27 ^ (- 2/3) c) root(3, 0, 375) * root(3, 9) + (3 ^ – 1 – root(4, 16/81)) ^ – 2