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曲线y=-x2+1在点(1,0)处的切线方程为( ) A.y=x-1 B.y=-...
曲线y=-x2+1在点(1,0)处的切线方程为( )
A.y=x-1
B.y=-x+1
C.y=2x-2
D.y=-2x+2
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