Question

срочно!!!(-5/7 5³×(-1)×(-0,2)²)²×9 4/5×5×(-1)⁸×(-0,2)​

Answer 1

Ответ:      125.

Объяснение:

(-5/7 a^3bc^2)^2 * 9 4/5 ab^8c = (-5/7)^2a^6b^2c^4 * 49/5 ab^8c =

= 25/49 * 49/5 a^(6+1)b^(2+8)c^(4+1) = 5a^7b^10c^5 =>

При a=5;  b=-1  c=-0.2 =>

5 * 5^7 * (-1)^10 * (0.2)^5 =  390625 * 1 * 0,00032 = 125.