Для решения используем свойства степеней: a^n * b^n = (ab)^n
1) 0,2^9 * 5^9 = (0,2*5)^9 = 1^9 = 1
2) 4^3 * 25^3 = (4 * 25)^3 = 100^3 = 1000000
3) (1/4)^8 * 8^8 = (1/4 * 8)^8 = (8/4)^8 = 2^8 = 256
4) (0,8)^4 * (125)^4 = (0,8*125)^4 = (100)^4 = 100000000
5) (2 1/3)^7 * (3/7)^8 = (7/3)^7 * (3/7)^8 = (7/3)^7 * (3/7)^7 * (3/7) = (7/3 * 3/7)^7 * (3/7) = 1^7 * (3/7) = 3/7
6) (0,5)^17 * 2^19 = (1/2)^17 * 2^17 * 2^2 = (1/2 * 2)^17 * 4= 1^17 * 4 = 4
Ответ: 1) 1, 2) 1000000, 3) 256, 4) 100000000, 5) 3/7, 6) 4