1:用loga X,loga Y,loga Z表示 loga 1/xyz
2:计算:log2 2根号2 3log2 2+log2 根号2 lg 根号10-lg 0.1 log3 27/5+log3 2/3- 6/5
1:用loga X,loga Y,loga Z表示 loga 1/xyz
2:计算:log2 2根号2 3log2 2+log2 根号2 lg 根号10-lg 0.1 log3 27/5+log3 2/3- 6/5
1)loga 1/xyz=0-loga (XYZ)= -( loga X+loga Y+ loga Z)
2)原式= (3/2)*3+(1/2)*(1/2)+3-log3 5 -1+log3 2-6/5
=111/20+ log3 2/5