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A.5x+16y+8=0 B.5x-16y+8=0
C.5x+16y-8=0 D.5x-16y-8=0
曲线上一点处的切线方程是
A.5x+16y+8=0
B.5x-16y+8=0
C.5x+16y-8=0
D.5x-16y-8=0
曲线-y-=0上一点P(4,-)处的切线方程是( )
A.5x+16y+8=0 B.5x-16y+8=0
C.5x+16y-8=0 C.5x-16y-8=0