tolong bantuanya ya..

[¼.a^(⅓)]^(-3/2):2a^(-3/2)
=[¼.a^(⅓)]^(-3/2):2a^(-3/2)
=(¼)^(-3/2).a^(⅓)]^(-3/2):2a^(-3/2)
=2³.a^(-½):2/√a³
=8.a^(-½).√a³/2
=8/√a.√a³/2
=8√a³/2√a
=4.√a³:√a
=4.a^(3/2-½)
=4a (A)