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3. B
maaf no 4 saya nggak bisa
= (4^3)^1/3 - (5^2)^1/2 + (3^2)^1/2
= 4 - 5 + 3 (pangkatnya boleh dicoret)
= 7 - 5
= 2
3. pokoknya pakai akar sekawan, tinggal dikalikan sama √3 +1 masing-masing penyebut dan pembilangnya. Nanti hasilnya
3 + √3
4. (3 log 8 + 3 log 4) : (3 log 8 - 3 log 2)
= (3 log 4 .8 ) : (3 log 8/2)
= (3 log 32) : (3 log 4)
= (3 log 2^5) : (3 log 2^2)
= (5 . 3 log 2) : (2 . 3 log 2) (3 log 2 dicoret)
= 5/2