Giúp mình với nha mọi người

`(2/3)^5 . (2/3)^? = (2/3)^8`

`(2/3)^? = (2/3)^8 : (2/3)^5`

`(2/3)^? = (2/3)^3`

`=> ? = 3`

Vậy `(2/3)^5 . (2/3)^3 = (2/3)^8`

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`((-3)/4)^? : ((-3)/4)^7 = ((-3)/4)^2`

`((-3)/4)^? = ((-3)/4)^2 . ((-3)/4)^7`

`((-3)/4)^? = ((-3)/4)^9`

`=> ? = 9`

Vậy `((-3)/4)^9 : ((-3)/4)^7 = ((-3)/4)^2`