函数f(x)=㏒2(2x+1)的图像关于(1,0)对称的图像解析式是
人气:106 ℃ 时间:2020-05-05 00:35:47
解答
在对称后的图像上任取一点P(x,y),则点P(x,y)关于点(1,0)对称后为(2-x,-y),
又点(2-x,-y)在f(x)上
所以-y=log2 (4-x+1)=log2(5-x)
y=-log2(5-x),即为所求解析式.
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