tolong jawab ya ,pakai cara :)

1) 8x-⁴
-----------
2x^-6

= 8x^6
-----------
2x⁴

= 4x² ( D )

2) a = √2 = 2^½
b = ³√3 = 3^⅓
c = ⁴√5 = 5^¼
maka
b < c < a ( C )

3) ( xy³ )-¹
---------------
( x-¹ y² )³

= x-¹ y-³
-------------
x-³ y^6

= x³
----------
x¹ y³ y^6

= x²
-------
y^9

= x² y^-9 ( A )

4) (256)^½ • (27)^⅓
= (2^8)^½ • ( 3³)^⅓
= 2⁴ • 3¹
= 16 • 3
= 48 ( C )

5) 125
= ( 5)³
bentuk pangkat negatif
= 1
------
5-³