Đáp án:
↓↓
Giải thích các bước giải:
`a)`
`4^8 . 8^4`
`=(2^2 )^8 . (2^3 ^4`
`=2^16 . 2^12`
`=2^(16+12)`
`=2^28 `
`b)`
$5^{12}$ . `7` `-` $5^{11}$ . `10`
`=` $5^{11}$ . $5^{1}$ . `7` `-` $5^{11}$ . `10`
`=` $5^{11}$ . `35``-` $5^{11}$ . `10`
`=` $5^{11}$ ( `35-10` )
`=5^11 . 25`
`=5^11 . 5^2`
`=5^13`
`c)`
`2^20. 15+2^10. 85`
`=2^10. 2^10. 3. 5+2^10. 5. 17`
`=2^10.5(2^10 .3 + 17)`
`d)`
`27^16 : 9^10 `
`= ( 3^3 )^16 : (3^2 )^10 `
`= 3^48 : 3^20 `
`= 3^28`
`e)`
`125^3 : 25^4`
`=( 5^3 )^3 : ( 5^2 )^4 `
`= 5^9 : 5^8`
`=5`
`f) 24^4 : 3^4 - 32^12 : 16^12`
`= (24:3)^4 - (32:16)^12`
`= 8^4 - 2^12`
`=( 2^3 )^4 - 2^12`
`=2^12 - 2^12`
`= 0`