§ 10: 10.11

10.11 Розв’яжіть рівняння:

1) x3 = 27; x = 3;	2) x5 = 9; x = 59;	3) x7 = –2; x = 7-2;
4) x4 = 16; x = ±2;	5) x6 = 5; x = ± 65;	6) x4 = –81; x ∈ ∅;

7) 27x³ – 1 = 0; 27x³ = 1; x³ = 127; x = 13;

8) (х – 2)³ = 125; х – 2 = 5; х = 7;

9) (х + 5)⁴ = 10000; (х + 5)⁴ = 10⁴; х + 5 = 10 або х + 5 = –10;

x = 5 або х = –15.