Đáp án+Giải thích các bước giải:
+)`((-2)/3)^{2n+3}.(2/3)^{2n}`
`=((-2)/3^{2n+3}.((-2)/3)^{2n}`
`=((-2)/3^{2n+3+2n}`
`=((-2)/3)^{4n+3}`
+)`2^{2n}. 2^{2n+3}`
`=2^{2n+2n+3}`
`=2^{4n+3}`
+)`3^{2n+1}:3^{2n-1}`
`=3^{2n+1-2n+1}`
`=3^{2}`
+)`(2^4)^3. (3^2)^4`
`=2^{12}. (3^2)^4`
`=(2^3)^4. (3^2)^4`
`=(2^3. 3^2)^4`
`=(8.9)^4`
`=72^4`
+)`(2/3)^n : (-1/3)^2`
`=(2/3: (-1)/3)^n`
`=(2/3. 3/(-1))^n`
`=(-2)^n`
`____________________________`
Chúc bạn học tốt!!
`#Rùa~ ~ ~`
