Mohon bantuannya kak!!!

1)
625^¾ = (5⁴)^¾ = 5³ = 125

2)
(9^¼ x 27^3/2)/(81^-⅜)
= (3^½ x 3^9/2)/(3^-¹²/8)
= 3^(½ + 9/2 – 12/8)
= 3^ ( 5 – 1½ )
= 3^3½
= 3^7/2