Ответ:а) 5x³ = 40; x³ = 8; x = 2.б) (3x)³ = −729; 3x = −9; x = −3.в) 4x⁵ = −12 500; x⁵ = −3125 = (−5)⁵; x = −5.г) (5x)⁴ = 10 000 = 10⁴; следовательно, 5x = ±10 и x = ±2.