2log 3=a dan 2log 5=b Nilai dari 4log 30

[tex] ^{4} log(30) \\ = \: ^{ {2}^{2} } log(2 \times 3 \times 5) ^{1} \\ = \frac{1}{2} ( ^{2} log(2) + ^{2} log(3) + ^{2} log(5) ) \\ = \frac{1}{2} (1 + a + b) \\ atau \\ 2 + 2a + 2b[/tex]