Đáp án + giải thích các bước giải : $\\$ `b)`` (9^2. 2^11)/(16^2 . 6^3)` $\\$` = ((3^2)^2 . 2^11)/((2^4)^2 . 2^3 . 3^3)` $\\$` = (3^4 . 2^11)/(2^11 . 3^3)` $\\$` = 3^4/3^3 ` $\\$` = 3` $\\$ `c)``(2^7. 9^3)/(6^5. 8^2)` $\\$` = (2^7 . (3^2)^3)/(2^5 . 3^5 . (2^3)^2)` $\\$` = (2^7 . 3^6)/(2^11 . 3^5)` $\\$` = 3/2^4` $\\$` = 3/16` $\\$ `d) ` ` (4^2 . 4^3)/(2^10)` $\\$` = (4^5)/2^10` $\\$` = ((2^2)^5)/2^10` $\\$` = 2^10/2^10` $\\$` = 1`
