log3^7乘以log2^9乘以log49^2=

log3 7·log2 9·log49 a=log4 1/2,则a= 若log3(7)·log2(9)·log49(a)=log4(1/2),则a的值等于 log2 9乘以log3 4等于多少 log2 25 乘以log3 4 乘以log5 9 、计算:log2的9次方乘以log3的8次方 log3/2乘以5log2/3怎么化简? (log3 4+log3 8)(log2 3+log2 9)+(log3 根号2)(log9 7)/(log1/3 7) 27046=2乘以( )+7乘以( )+4乘以( )+6乘以( ) log2(3)+log3(5)+log3(2)=? log2 3×log3 7=log2 7 log2 3乘以log2 3等于2log2 log2(3)=a,log3(7)=b.log12(56)=log3(7*8)=log3(7)+3log3(2)