对数函数1 .将下列指数式化为对数式，对数式化为指数式(1)(3)3-2(”16log127310gx64(4)10g 2 x(2)2 .求下列格式中的x1 -3logx27-(1)2(3)10gx(32、2)2(4)10g5(10g2x)0I”1Xlog27-9&log89?log3323.4设4a521b，求m的值5loga25.设m,loga32mnn,求aQ3x33xj1)设x10g23,求x的值一，ab.、11一一已知11.2a1000,0.0112b1000，求的值ab7计算21gJ2)21gJ2?1g5J(1g板)21g21(1)计算210g32log332log385210g539(3)1，一右f(log2x)X,求f2的值若log2log3log4x0,log3log4log2y0,求xy勺值(4)18化简(1)4lg23lg5lg510g52?10g4981(2) 10g251?10g734已知logi89a,18b5,用a,b表示log3645的值9.10.计算(log2125log425log85)(log52log254log1258)若a.b是方程21gx)2lgx410的两个实根，求lg(ab)?(logablogba)的值12设x,y为非零实数，a0,且a1,则下列式子中正确的有（I.(1)logax22logax(lOgax22lOgaxlogaxyloga(3)x?logaylOgaXloga-ylogayA.1个B.2个C.3个D.4个X ，lgx lgy ,求一的值y若lg(xy)1g(x2y)=lg213.