1.函数y=f(x)定义在区间【-2,3】上,则函数y=f(x)的图像与直线x=2的交点有几个2.设f(x)=lg (2+x)/(2-x)则f(x/2)+f(2/x)的定义域为3已知集合A={x|y=log2 (mx^2-2x+2)},集合B={x|(2-x)
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