无限循环小数[img=120x18]1802fa04073889c.png[/img]在十进制小数意义下等于多少?
A: [img=36x43]1802fa04104f202.png[/img]
B: [img=27x43]1802fa04197d699.png[/img]
C: [img=27x43]1802fa04227011c.png[/img]
D: [img=27x43]1802fa042abf0e9.png[/img]
A: [img=36x43]1802fa04104f202.png[/img]
B: [img=27x43]1802fa04197d699.png[/img]
C: [img=27x43]1802fa04227011c.png[/img]
D: [img=27x43]1802fa042abf0e9.png[/img]
举一反三
- 图示一正方体,边长为a,力F沿EC作用。则该力对x轴的矩为:Mx=______________[img=335x335]180347ed70f63f6.png[/img] A: Fa B: -Fa C: [img=148x147]180347ed7c5dfd3.png[/img] D: [img=161x127]180347ed874c7cd.png[/img]
- 如图所示,正六面体边长为a,[img=54x22]1803b20e19c9709.png[/img],[img=79x27]1803b20e222d9a4.png[/img]则[img=18x22]1803b20e2a0b2e7.png[/img]、[img=18x22]1803b20e32270c7.png[/img]对z轴的矩为( )[img=509x547]1803b20e3d4da79.png[/img] A: Mz(F1)= -Fa, Mz(F2)=0 B: Mz(F1)=0, Mz(F2)=Fa C: Mz(F1)=Fa, Mz(F2)=Fa D: Mz(F1)=Fa, Mz(F2)=0
- 函数f(x)是一个以4为周期函数, 且[img=201x51]1803c1e127b30fb.png[/img], [img=253x62]1803c1e13287ecc.png[/img]是f(x)的傅里叶级数,则系数[img=16x17]1803c1e13b026c2.png[/img]等于 A: [img=43x43]1803c1e1432db72.png[/img] B: [img=27x43]1803c1e14bd3bbb.png[/img] C: [img=43x43]1803c1e153dacb9.png[/img] D: [img=27x43]1803c1e15c13aa6.png[/img] E: [img=36x43]1803c1e1634ccec.png[/img] F: [img=20x43]1803c1e16b6bcc7.png[/img] G: [img=36x43]1803c1e1736da9c.png[/img] H: [img=9x18]1803c1e17be1b39.png[/img]
- 函数f(x)是一个以4为周期函数, 且[img=201x51]1803229f225cf07.png[/img], [img=253x62]1803229f2def977.png[/img]是f(x)的傅里叶级数,则系数[img=16x17]1803229f3661184.png[/img]等于 A: [img=43x43]1803229f3f4c3ab.png[/img] B: [img=27x43]1803229f494e3cf.png[/img] C: [img=43x43]1803229f5294b04.png[/img] D: [img=27x43]1803229f5c03404.png[/img] E: [img=36x43]1803229f649b52a.png[/img] F: [img=20x43]1803229f6cc739a.png[/img] G: [img=36x43]1803229f74fa6eb.png[/img] H: [img=20x43]1803229f7cea25a.png[/img]
- 函数f(x)是一个以4为周期函数, 且[img=201x51]1803856888e46d7.png[/img], [img=253x62]18038568948ab14.png[/img]是f(x)的傅里叶级数,则系数[img=16x17]180385689d681e9.png[/img]等于 A: [img=43x43]18038568a55bdbd.png[/img] B: [img=27x43]18038568ad18c11.png[/img] C: [img=43x43]18038568b517331.png[/img] D: [img=27x43]18038568bdaef65.png[/img] E: [img=36x43]18038568c76e3ad.png[/img] F: [img=20x43]18038568cfb8256.png[/img] G: [img=36x43]18038568d6b5a80.png[/img] H: [img=9x18]18038568e028db2.png[/img]