tolong dibantu... no 1-3

1. [(p^4 q^2 r^-3) : (p^3 q^-1 r^-5)]^2
= [(p^8 q^4 r^-6) : (p^6 q^-2 r^-10)]
= p^8-6 q^4-(-2) r^-6-(-10)
= p^2 q^4+2 r^-6+10
= p^2 q^6 r^4. E.

2. (4√5)/(3-√5)
= (4√5)/(3-√5) × (3+√5)/(3+√5)
= (12√5 + 4×5)/(9-5)
= (12√5+20)/4
= 3√5+5
= 5 + 3√5 C.

3. ^3log343 × ^6log(1/81) × ^7log216
= ^3log7^3 × ^6log3^-4 × ^7log6^3
= 3(^3log7) × -4(^6log3) × 3(^7log6)
= 3 × (-4) × 3
= -36 A.

maaf jika salah