`@` `\text {Ans}`
`\downarrow`
`a)`
`16^3 = (4^2)^3 = 4^6`
`b)`
`25^6 = (5^2)^6 = 5^12`
`c)`
`81^5 = (9^2)^5 = 9^10`
`d)`
`27^5 = (3^3)^5 = 3^15`
`e)`
`64^3*16^3`
`= (4^3)^3*(4^2)^3`
`= 4^9*4^6`
`= 4^15`
_____
`@` Nâng lên lũy thừa
CT: `(a^m)^n=a^m*a^n = a^(m*n)`