Nihh udah keliatan jelas belum

Dik :
a = 4
b = 8

( a^1/2 . b^1/3 : a^-1 . b^2 )
= ( a^3/2 . b^-5/2 )
= ( 4^3/2 : 8^5/2)
= ( (2^2)^3/2 : (2^3)^5/2 )
= 2^3 : 2^15/3
= 2^-6/3
= 2^-2
= 1/2^2 = 1/4

Semoga membantu.