nilai dari 3log63+ 3log18+ 3log42 adalah

[tex]3\log63+3\log18+3\log42=\cdots \\ \\ & =3\log\left(3^{2}\cdot7\right)+3\log\left(3^{2}\cdot2\right)+3\log\left(3\cdot2\cdot7\right)\\ & =3\log3^{2}+3\log7+3\log3^{2}+3\log2+3\log3+3\log2+3\log7\\ & =2\left(3\log3\right)+3\log7+2\left(3\log3\right)+3\log2+1+3\log2+3\log7\\ & =2+2+1+2\left(3\log7\right)+2\left(3\log2\right)\\ & =5+3\log7^{2}+3\log2^{2} [/tex]