Jawab:
A. x = 6
B. x = 2
C. x = 3
Penjelasan dengan langkah-anju:
ⁿlog a + ⁿlog b = ⁿlog(ab)
ⁿlog a – ⁿlog b = ⁿlog(a÷b)
A. ²log x³ – ²gelondong 27 = 3
²log (x³ ÷ 27) = 3(²gelondong 2)
²log (x³ ÷ 3³) = ²log 2³
x³ ÷ 3³ = 2³
(x/3)³ = 2³
x/3 = 2
x = 2(3)
x = 6
B. gelondong x + log 3 = log 6
log(x · 3) = batang kayu 6
x · 3 = 6
x = 6 ÷ 3
x = 2
C. gelondong x – log 15 = log 0,2
log (x ÷ 15) = gelondong 0,2
x ÷ 15 = 0,2
x = 15(0,2)
x = 3
(xcvi)
