Jika [tex]\large{\bold{ ^{7} log \: 2 = a}}[/tex] dan [tex]\large{\bold{ ^{2} log \: 3 = b}}[/tex]. MAKA [tex]\large{\bold{ ^{12} log \: 14\sqrt3}}[/tex] = ... A.) [tex]\frac{2a+ab+2}{2a(2+b)}[/tex] B.) [tex]\frac{2a+ab+1}{2a(2+b)}[/tex] C.) [tex]\frac{2a+ab-2}{2a(2+b)}[/tex] D.) [tex]\frac{2a+ab-1}{2a(2+b)}[/tex] E.) [tex]\frac{2a+ab+2}{2a(a+b)}[/tex] _____ *jika latex tidak terbaca, silahkan buka lewat web. selamat mencoba!
Verified answer
Penjelasan dengan langkah-langkah:
LogAritma
Diberikan
⁷log 2 = a → ²log 7 = 1/a
²log 3 = b → ³log 2 = 1/b
ab = ⁷log 3
maka ¹²log 14√3
= ¹²log14.3^½
...... gunakan sifat logaritma ⁿlog m → log m / log n
= (log 14.3^½)/log 12
= (²log7+²log2+²log3^½)× 1/(²log 3+²log 4)
= (1/a+1+½b) × 1/(b+2)
= (2+2a+ab)/2a × 1/(b+2)
= (2+2a+ab)/(2a(b+2))
= (2a+ab+2)/(2a(2+b) ( A )