lim(fx-x^3)/x^2=2,limfx/x=1,求fx
lim(fx-x^3)/x^2=2,limfx/x=1,求fx
李萨如图形fx:fy=2:3和fy:fx=2:3有什么区别.
李萨如图形fx:fy=2:3和fy:fx=2:3有什么区别.
图示的力分别在x、y、z三轴上的投影为( )。[img=277x232]17da6be1061d917.png[/img] A: Fx= - 2Ö2P/5, Fy=3Ö2P/10, Fz=Ö2P/2 B: Fx=2Ö2P/5, Fy= - 3Ö2P/10, Fz= - Ö2P/2 C: Fx=2Ö2P/5, Fy=3Ö2P/10, Fz=Ö2P/2
图示的力分别在x、y、z三轴上的投影为( )。[img=277x232]17da6be1061d917.png[/img] A: Fx= - 2Ö2P/5, Fy=3Ö2P/10, Fz=Ö2P/2 B: Fx=2Ö2P/5, Fy= - 3Ö2P/10, Fz= - Ö2P/2 C: Fx=2Ö2P/5, Fy=3Ö2P/10, Fz=Ö2P/2
图示的力分别在x、y、z三轴上的投影为( )[img=260x229]17da6bdfca38d6f.png[/img] A: Fx= - 3Ö2P/10, Fy= 2Ö2P/5, Fz= - Ö2P/2 B: Fx= - 2Ö2P/5, Fy= 3Ö2P/10, Fz= - Ö2P/2 C: Fx= 3Ö2P/10, Fy= - 2Ö2P/5, Fz= - Ö2P/2
图示的力分别在x、y、z三轴上的投影为( )[img=260x229]17da6bdfca38d6f.png[/img] A: Fx= - 3Ö2P/10, Fy= 2Ö2P/5, Fz= - Ö2P/2 B: Fx= - 2Ö2P/5, Fy= 3Ö2P/10, Fz= - Ö2P/2 C: Fx= 3Ö2P/10, Fy= - 2Ö2P/5, Fz= - Ö2P/2
设集合A={1, 2, 3}, 不是A上的等价关系。 A: {(1, 1), (2, 2), (3, 3)} B: {(1, 1), (2, 2), (3, 3), (1, 3), (3, 1)} C: {(1, 1), (2, 2), (3, 3), (2, 3)} D: {(1, 1), (2, 2), (2, 3), (3, 2), (2, 1), (1, 2), (3, 3), (1, 3), (3, 1)}
设集合A={1, 2, 3}, 不是A上的等价关系。 A: {(1, 1), (2, 2), (3, 3)} B: {(1, 1), (2, 2), (3, 3), (1, 3), (3, 1)} C: {(1, 1), (2, 2), (3, 3), (2, 3)} D: {(1, 1), (2, 2), (2, 3), (3, 2), (2, 1), (1, 2), (3, 3), (1, 3), (3, 1)}
设集合A ={1, 2, 3}, 下列关系R中哪些是等价关系?A、{<1, 1>, <2, 2>, <3, 3>}B、{<1, 1>, <2, 2>, <3, 3>, <3, 2>, <2, 3>}C、{<1, 1>, <2, 2>, <3, 3>, <1, 3>}D、{<1, 1>, <2, 2>, <1, 2>, <2, 1>, <1, 3>, <3, 1>, <3, 3>, <2, 3>, <3, 2>}
设集合A ={1, 2, 3}, 下列关系R中哪些是等价关系?A、{<1, 1>, <2, 2>, <3, 3>}B、{<1, 1>, <2, 2>, <3, 3>, <3, 2>, <2, 3>}C、{<1, 1>, <2, 2>, <3, 3>, <1, 3>}D、{<1, 1>, <2, 2>, <1, 2>, <2, 1>, <1, 3>, <3, 1>, <3, 3>, <2, 3>, <3, 2>}
下面程序的功能是输出以下9阶方阵。请填空。 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 1 1 2 3 3 3 3 3 2 1 1 2 3 4 4 4 3 2 1 1 2 3 4 5 4 3 2 1 1 2 3 4 4 4 3 2 1 1 2 3 3 3 3 3 2 1 1 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 # include
下面程序的功能是输出以下9阶方阵。请填空。 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 1 1 2 3 3 3 3 3 2 1 1 2 3 4 4 4 3 2 1 1 2 3 4 5 4 3 2 1 1 2 3 4 4 4 3 2 1 1 2 3 3 3 3 3 2 1 1 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 # include
fx=1/2^x+根号2,求f(-5)+f(-4)+...+f(0)
fx=1/2^x+根号2,求f(-5)+f(-4)+...+f(0)
用以下公式求 f(x) 的值。当通项的绝对值小于 10^-7 时停止计算, x 的值由键盘输入。 f(x)=a 1 x^1-a 2 x^2+a 3 x^3-...+(-1) ^(n+1)*a n x^n+...,|X|<1 其中 a 1 =1 , a 2 =2 , a n =1/(a n-2 +a n-1 ) ,n=1,2,3,4,5,... Option Explicit Private Sub Commandl_Click() Dim x As Single , fx As Single Dim a As Single,a1 As Single,a2 As Single Dim t As Single a1=l : a2=2 x=text1 If ___________ Then MsgBox("x 必须在 -1---1 之间 ") ExitSub End If fx=a 1 *x-a 2 *x*x t=(-1)*x*x Do a=1/(a l +a 2 ) t=(-1)*x*x fx= __________ a l =a 2 Loop Until Abs(a*t)<0.0000001 Text2=fx End Sub
用以下公式求 f(x) 的值。当通项的绝对值小于 10^-7 时停止计算, x 的值由键盘输入。 f(x)=a 1 x^1-a 2 x^2+a 3 x^3-...+(-1) ^(n+1)*a n x^n+...,|X|<1 其中 a 1 =1 , a 2 =2 , a n =1/(a n-2 +a n-1 ) ,n=1,2,3,4,5,... Option Explicit Private Sub Commandl_Click() Dim x As Single , fx As Single Dim a As Single,a1 As Single,a2 As Single Dim t As Single a1=l : a2=2 x=text1 If ___________ Then MsgBox("x 必须在 -1---1 之间 ") ExitSub End If fx=a 1 *x-a 2 *x*x t=(-1)*x*x Do a=1/(a l +a 2 ) t=(-1)*x*x fx= __________ a l =a 2 Loop Until Abs(a*t)<0.0000001 Text2=fx End Sub
已知x = {1:1, 2:2},那么执行语句x.update({2:3, 3:3})之后,表达式sorted(x.items())的值为____________________。 A: [(1, 1), (2, 3), (3, 3)] B: [(1, 1), (2, 2), (3, 3)] C: [(1, 1), (2,2),(2, 3), (3, 3)] D: (1, 1), (2, 3), (3, 3)
已知x = {1:1, 2:2},那么执行语句x.update({2:3, 3:3})之后,表达式sorted(x.items())的值为____________________。 A: [(1, 1), (2, 3), (3, 3)] B: [(1, 1), (2, 2), (3, 3)] C: [(1, 1), (2,2),(2, 3), (3, 3)] D: (1, 1), (2, 3), (3, 3)