已知一质点的运动方程为x=2t,y=-5[img=14x22]180376837067b48.png[/img](t为时间),则轨迹方程为
A: 4y+5[img=18x22]1803768379522de.png[/img]=0
B: [img=18x22]1803768379522de.png[/img]+[img=17x26]180376838bf103f.png[/img]=4
C: 4y=5[img=18x22]1803768379522de.png[/img]
D: y/x=5/2
A: 4y+5[img=18x22]1803768379522de.png[/img]=0
B: [img=18x22]1803768379522de.png[/img]+[img=17x26]180376838bf103f.png[/img]=4
C: 4y=5[img=18x22]1803768379522de.png[/img]
D: y/x=5/2
举一反三
- 已知一质点的运动方程为x=2t,y=-5[img=14x22]180376837067b48.png[/img](t为时间),则轨迹方程为 未知类型:{'options': ['4y+5[img=18x22]1803768379522de.png[/img]=0', '1803768379522de.png+[img=17x26]180376838bf103f.png[/img]=4', '4y=5[img=18x22]1803768379522de.png[/img]', 'y/x=5/2'], 'type': 102}
- 已知一质点的运动方程为x=6t,y=10[img=14x22]180376906c49a2d.png[/img](t为时间),则轨迹方程为 A: 18y=5[img=18x22]180376907500290.png[/img] B: [img=18x22]180376907500290.png[/img]+[img=17x26]1803769085aaeb6.png[/img]=100 C: [img=18x22]180376907500290.png[/img]+[img=17x26]1803769085aaeb6.png[/img]=36 D: 18y+5[img=18x22]180376907500290.png[/img]=0
- 已知一质点的运动方程为x=6t,y=10[img=14x22]180376906c49a2d.png[/img](t为时间),则轨迹方程为 未知类型:{'options': ['18y=5[img=18x22]180376907500290.png[/img]', '180376907500290.png+[img=17x26]1803769085aaeb6.png[/img]=100', '180376907500290.png+[img=17x26]1803769085aaeb6.png[/img]=36', '18y+5[img=18x22]180376907500290.png[/img]=0'], 'type': 102}
- 若 X, Y,满足DX=DY=[img=18x22]1803dfef6dae947.png[/img],E(XY)=EXEY,则D(X-2Y)的值是( )(A)2 [img=18x22]1803dfef6dae947.png[/img] (B)3 [img=18x22]1803dfef6dae947.png[/img] (C)4 [img=18x22]1803dfef6dae947.png[/img] (D)5[img=18x22]1803dfef6dae947.png[/img] A: 2 [img=18x22]1803dfef98590fb.png[/img] B: 3 [img=18x22]1803dfef98590fb.png[/img] C: 4 [img=18x22]1803dfef98590fb.png[/img] D: 5[img=18x22]1803dfef98590fb.png[/img]
- 若 X, Y,满足DX=DY=[img=18x22]17de6024b9b2db4.png[/img],E(XY)=EXEY,则D(X-2Y)的值是( )(A)2 [img=18x22]17de6024b9b2db4.png[/img] (B)3 [img=18x22]17de6024b9b2db4.png[/img] (C)4 [img=18x22]17de6024b9b2db4.png[/img] (D)5[img=18x22]17de6024b9b2db4.png[/img] 未知类型:{'options': ['2[img=18x22]17de6024b9b2db4.png[/img]', '3[img=18x22]17de6024b9b2db4.png[/img]', '4[img=18x22]17de6024b9b2db4.png[/img]', '5[img=18x22]17de6024b9b2db4.png[/img]'], 'type': 102}