Làm giúp mình bài này với

Đáp án `+` Giải thích các bước giải:

`bb (4A.)`

`a) (8/3)^8 . (9/4)^8`

`= (8/3 . 9/4)^8`

`= 6^8`

`b) (3/7)^12 . (21/5)^12`

`= (3/7 . 21/5)^12`

`= (9/5)^12`

`c) (-4/13)^5 . (26/5)^5`

`= (-4/13 . 26/5)^5`

`= (-8/5)^5`

`d) (-10/3)^4 : (-5/6)^4`

`= [(-10/3) : (-5/6)]^4`

`= 4^4`

`= 256`

`e) (4/7)^19 : (-21/35)^19`

`= [4/7 : (-21/35)]^19`

`= (-20/21)^19`

`f) (-4/7)^11 : (16/(-28))^11`

`= [(-4/7) : (-16/28)]^11`

`= 1^11`

`= 1`

``

`bb (4B)`

`a) (1/5)^5 . 5^5`

`= (1/5 . 5)^5`

`= 1^5`

`= 1`

`b) (2/5)^9 . 5^9`

`= (2/5 . 5)^9`

`= 2^9`

`= 512`

`c) (4/9)^3 . (3/2)^3`

`= (4/9 . 3/2)^3`

`= (2/3)^3`

`= 8/27`

`d) (-11/4)^2 : (22/8)^2`

`= (-11/4 : 22/8)^2`

`= (-1)^2`

`= 1`

`e) (5/8)^3 : (-35/22)^3`

`= [5/8 : (-35/22)]^3`

`= (-11/28)^3`

`f) (-6)^8 : (6/5)^8`

`= (-6 : 6/5)^8`

`= (-5)^8`