Đáp án:
Giải thích các bước giải:
10) `(-1/3)^3 . 3^3`
`= (-1/3 . 3)^3 = (-1)^3 = -1`
11) `(1/5)^5 . 5^5`
`= (1/5 . 5)^5 = 1^5 = 1`
12) `(1/5)^3 . 10^3`
`= (1/5 . 10)^3 = 2^3 = 8`
13) `(-2/3)^4 : 2^4`
`= (-2/3 : 2)^4 = (-2/3 . 1/2)^4 = (-1/3)^4 = 1/81`
14) `(2/3)^4 . 9^2`
`= (2/3)^4 . (3^2)^2`
`= (2/3)^4 . 3^4`
`= (2/3 . 3)^4 = 2^4 = 16`
15) `(1/2)^3 . (1/4)^2`
`= (1/2)^3 . [(1/2)^2]^2`
`= (1/2)^3 . (1/2)^4 = (1/2)^7 = 1/128`
16) `(-2)^2 . (-2)^3`
`= (-2)^(2 + 3) = (-2)^5 = -32`
17) `12 . (-2/3)^2 + 4/3`
`= 12 . 4/9 + 4/3 = 48/9 + 4/3 = 16/3 + 4/3 = 20/3`
18) `4/5 . (7/2 + 1/4)^2`
`= 4/5 . (14/4 + 1/4)^2`
`= 4/5 . (15/4)^2`
`= 4/5 . 225/16 = 45/4`
Học tốt. Nocopy. Xin hay nhất
