1.已知lgx+lgy=2lg(x-2y)求log(√2)(x/y)的值2.设3^a=4^b=36 求2/a+1/b的值3.y=log(1/2)(3+2x-x^2) 解方程就这几道题,别说什么区翻翻书了,我自学的,很困扰的,上面的题都是对数函数的,求详细截图过程和思
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