18题第二小问,19题第二小问,19题第二小问重点讲方法,
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18题第二小问,19题第二小问,19题第二小问重点讲方法,
![](http://img.wesiedu.com/upload/a/b6/ab61e5f6326941b850a5d7a0066023dc.jpg)
![](http://img.wesiedu.com/upload/a/b6/ab61e5f6326941b850a5d7a0066023dc.jpg)
![18题第二小问,19题第二小问,19题第二小问重点讲方法,](/uploads/image/z/1808688-48-8.jpg?t=18%E9%A2%98%E7%AC%AC%E4%BA%8C%E5%B0%8F%E9%97%AE%2C19%E9%A2%98%E7%AC%AC%E4%BA%8C%E5%B0%8F%E9%97%AE%2C19%E9%A2%98%E7%AC%AC%E4%BA%8C%E5%B0%8F%E9%97%AE%E9%87%8D%E7%82%B9%E8%AE%B2%E6%96%B9%E6%B3%95%2C)
lg5+lg2+5^log5(2)+log1/2(4)
=lg(5*2)+2+log2^(-1)(4)
=1+2-log2(4)
=3-2
=1
19.
任取 x1 x2 属于「 -2,正无穷 且 x1
再问: 谢谢您
=lg(5*2)+2+log2^(-1)(4)
=1+2-log2(4)
=3-2
=1
19.
任取 x1 x2 属于「 -2,正无穷 且 x1
再问: 谢谢您