2.案例8.7在fx2()中输出x值,是fx2()的内部变量x值
举一反三
- 【单选题】已知: fx=@(x) 2*x.^2+5*x-1; 则求f(x)=2x2+5x-1=0在x0=-2附近根的命令是()。 A. z=fzero(fx,0.5) B. z=fzero(@fx,0.5) C. z=fzero(fx,-2); D. z=fzero(@fx,-2);
- 做等角速度ω旋转的容器中,液体上作用的单位质量力为: A: fx=ω^2*x, fy=ω^2*y, fz=0 B: fx=ω^2*x,fy=ω^2*y,fz=-g C: fx=ω^2*x,fy=ω^2*y,fz=g D: fx=0,fy=0,fz=-g
- 已知函数文件fx.m:()function()f=fx(x)()f=2*x.^2+5*x-1;()则求f(x)=2x2+5x-1=0在x0=-2附近根的命令是()。A.()z=fzero(fx,0.5)()B.()z=fzero(@fx,0.5)()C.()z=fzero(fx,-2);()D.()z=fzero(@fx,-2);
- lim(fx-x^3)/x^2=2,limfx/x=1,求fx
- 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