log2 20---log2 5+log3 4 * log4 3 等于什么

log2(20)-log2(5)+2log3(2)×log4(3) [log2(3)+log4(9)][log3(4)+log9(2)]等于 log的计算 ：log2（20）-log4（25)= log3(2)×log2（5）×log5（3）=?log2[log 1.log2 3*log3 4*log4 5*log5 2 2.(log4 3+log8 3)8(log3 2+log9 (log2 5+log4 125)log3 2/ log根号3 5 （log2 3+log4 27）(log3 4+log27 16) log2(3)*log3(4)*log4(5)*.log(k+1)(k+2)=log2(k+2) 怎么证 运用对数换底公式化简log2(3)*log3(4)*log4(5)*log5(2), 帮忙换底化简下列:logaC*logcA .log2 3 * log3 4 * log4 5 * log5 2 log2(3)*log3(4)*log4(5)*log5(6)*log6(7)*log7(8)=? log2 3 · log3 4 ·log4 5 ·log5 2 前面的是底数 log2(3)+log3(4)+log4(5)+log5(6)+log6(7)+log7(8)