1) Tính: a) 27^11.81^46:3^105 b) 128^41:64^34:4^11

Đáp án+Giải thích các bước giải:

`a)`

`27^11 .81^46:3^105`

`=(3^3)^11 .(3^4)^46:3^105`

`=3^(3.11) .3^(4.46):3^105`

`=3^33 .3^184:3^105`

`=3^(33+184-105)`

`=3^112`

`b)`

`128^41:64^34:4^11`

`=(2^7)^41:(2^6)^34:(2^2)^11`

`=2^(7.41):2^(6.34):2^(2.11)`

`=2^287:2^204:2^22`

`=2^(287-204-22)`

`=2^61`

`#ld`