题目内容

曲线sin(xy)+ln(y-x)=x在点(0，1)处的切线方程为______．

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设函数y(x)由参数方程确定，则曲线y=y(x)向上凸的x取值范围为______．

若在(-∞，+∞)上连续，则a=______．

Paul McCartney planned to tour Britain with his series of concerts for

A. one year.
B. three years.
C. six years.
D. ten years.

微分方程的通解是______．