kak tolong bantu jawab soal yang nomor 1-4, pake caranya!!

Semoga membantu ^^ maaf kalau salah atau gambarnya kurang jelas

1) 1/8 . (2^5 . 3^5)^(4/5)
    = 1/8 . (2^4 . 3^4)
    = 1/8 . 16 . 81 = 2 . 81 = 162
2) 5^(3.2/3) . 2^(3.2/3) . 1 = 5^2 . 2^2 = 25 . 4 = 100
4) 1/81 : 1/27 = 1/81 . 27/1 = 1/3
5) 2^(5.-3/5) : 2^(5.4/5) = 2^-3 : 2^4 = 1/8 : 16 = 1/8 . 1/16 = 1/128
6) 25 . 125 : 625 = 5
7) 9^5 : 3 = 3^10 : 3 = 3^9 = 19683
8) 5^3 : 1/125 = 125 . 125 = 15625
9) a) 2^x = 2^5 >>>>  x = 5
    b) 2^4x = 2^-1 >>  4x = -1  >> x = -1/4
    c) 10^(2x-1) = 10^-3
         2x - 1 = -3
         2x = -2  >>> x = -1