• 2022-07-02
    曲线[img=114x17]17e445bf1082b85.jpg[/img]在点(0,-1)的切线方程是()
    A: y+1=0
    B: y-1=0
    C: x=0
    D: x-y+1=0
  • A

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      下列语句与y=(x>;0?1:x<;0?-1:0);语句功能相同是( ) A: if (x) if(x>;0) y=1; else if(x<;0) y=-1;else y=0; B: y=-1; if(x>;0) y=1; else y=-1; C: if (x>;0) y=1; else if(x<;0) y=-1; else y=0; D: y=0; if(x>;=0) y=1;else if(x==0) y=0; else y=-1;

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      曲线[img=73x28]180391dd2834d92.png[/img] A: y=1 B: y=0 C: x=1 D: x=0

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      填补下图邻接矩阵( )[img=448x230]17de70f872e6a88.jpg[/img]邻接矩阵: V1V2V3V4V5V6V7V10000101V21010000V3000X000V40000Z10V5011Y001V60000100V70000010 A: X=1; Y=1; Z=0 B: X=1; Y=1; Z=1 C: X=1; Y=0; Z=0 D: X=0; Y=1; Z=0

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      求解常微分方程初值问题[img=224x61]1803072f6b2a05a.png[/img]应用的语句是 A: DSolve[2y[x]y"[x]==1+(y'[x])^2,y[0]==1,y'[0]==0,y[x],x B: DSolve[{2y[x]y" [x]==1+(y'[x])^2,y[0]==1,y'[0]==0},y[x],x] C: DSolve[{2y[x]y" [x]==1+(y^' [x])^2;y[0]==1;y'[0]==0},y[x],x] D: DSolve[{2yy"==1+(y^' )^2&&y[0]==1&&y'[0]==0},y[x],x]

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      分段函数:[img=206x91]18037123bea18f3.png[/img],下面程序段中正确的是__________。 A: If x < 0 Then y = 0If x < 1 Then y = 1If x < 2 Then y = 2If x >= 2 Then y = 3 B: If x > =2 Then y = 3ElseIf x > =1 Then y = 2ElseIf x > =0 Then y = 1Else y = 0End If C: If x >= 2 Then y = 3If x >= 1 Then y = 2If x > 0 Then y = 1If x < 0 Then y = 0 D: If x < 0 Then y = 0ElseIf x > 0 Then y = 1ElseIf x > 1 Then y = 2Else y = 3End If E: If x < 0 Then y = 0If 0 <= x <1 Then y = 1If 1 <= x < 2 Then y = 2If x >= 2 Then y = 3