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曲线在点(1,1)处的切线方程为
A.x-y-2=0
B.x+y-2=0
C.x+4y-5=0
D.x-4y-5=0
曲线在点(0,1)处的切线方程为
A. B. C. D.
曲线在点(1,0)处的切线方程为 ( )