Jika 2log 3 = a dan 3log5 = b maka 2 log 15 = bantu pake caranya yaa
maskanjeng
2log 3 3lg 5 = 2 log 5 = ab sifat logaritma maka
2 log 5 + 2 log 3 = ab + a
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mengkunegara
2 log 15 = 2 log (3x5) *pake sifat x log (y+z) = x log y + x log z = 2 log 3 + 2 log 5 *pake sifat x log y . y log z = x log z = a + 2 log 3 . 3 log 5 = a + a.b = a(1+b)
maka
2 log 5 + 2 log 3 = ab + a
= 2 log (3x5) *pake sifat x log (y+z) = x log y + x log z
= 2 log 3 + 2 log 5 *pake sifat x log y . y log z = x log z
= a + 2 log 3 . 3 log 5
= a + a.b
= a(1+b)