设(),求y的4阶导数错误的命令是()A.()syms()f(x)()f(x)=exp(x)*cos(x)()diff(f,4)()B.()syms()f(x)()f(x)=exp(x)*cos(x)()diff(f,x,4)()C.()syms()f(x)()f(x)=exp(x)*cos(x)()diff(f,4,x)()D.()syms()f(x)()f(x)=exp(x)*cos(x)()diff(f,x)
syms()f(x)()f(x)=exp(x)*cos(x)()diff(f,x)()
举一反三
- 下面的命令表示( ) syms a x y f=sin(a*x)+y^2*cos(x); dfdx=diff(f);
- 17e0b849d3a4a3b.jpg,计算[img=19x34]17e0ab14a855463.jpg[/img]的实验命令为( ). A: syms x; f=diff((1+sin(x)^2)/cos(x),1)f=2*sin(x) + (sin(x)*(sin(x)^2 + 1))/cos(x)^2 B: f=diff((1+sinx^2)/cosx,1)f=1/2/x^(1/2)/(1-x)^(1/2) C: syms x;f=diff((1+sinx^2)/cosx,1)f=2*sin(x) + (sin(x)*(sin(x)^2 + 1))/cos(x)^2
- 17da426f4cb2265.jpg,计算[img=23x22]17da426f58ddf0c.jpg[/img]实验命令为( ). A: f=diff(log(x),3)f=2/x^3 B: syms x; f=diff(log(x),3)f=2/x^3 C: syms x;f=diff(logx,3)f=2/x^3
- 17e0a756f3d6e2a.jpg,计算[img=23x22]17e0b849ab0b36c.jpg[/img]实验命令为( ). A: f=diff(log(x),3)f=2/x^3 B: syms x; f=diff(log(x),3)f=2/x^3 C: syms x;f=diff(logx,3)f=2/x^3
- 求以下定积分可以使用的命令有()。[img=187x84]1802f8c916e3b88.jpg[/img] A: I=integral(@(x) x./(1+abs(cos(x))),1/exp(1),exp(1)) B: f=@(x) x./(1+abs(cos(x))); q=integral(f,1/exp(1),exp(1)) C: f=@(x) x./(1+abs(cos(x))); q=integral(@f,1/exp(1),exp(1)) D: syms xf=x/(1+abs(cos(x)));s=int(f,x,1/exp(1),exp(1))eval(s)
内容
- 0
求以下定积分可以使用的命令有()。[img=225x88]1802f8c8f4b73be.jpg[/img] A: 先建立被积函数文件f1.m:function f=f1(x) f=x./(1+abs(cos(x)));再求定积分:integral(@f1,1/exp(1),exp(1)) B: f=@(x) x./(1+abs(cos(x))); q=integral(f,1/exp(1),exp(1)) C: f=@(x) x./(1+abs(cos(x))); q=integral(@f,1/exp(1),exp(1)) D: syms x f=x/(1+abs(cos(x))); s=int(f,x,1/exp(1),exp(1)) eval(s)
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实验命令“syms x y; f=x^3+y^3-3*x*y; fx=diff(f,'x'); fy=diff(f,'y'); [x0 y0]=solve(fx,fy)” 的结果是【】.
- 2
要求f(x)的二阶导数,应使用命令: A: diff(f(x),xx) B: diff(f(x),'x','x') C: diff(f(x),2) D: diff(f(x),'x',2)
- 3
已知[img=114x30]1802e1b222c5fc3.jpg[/img],f(x)的两阶导数的命令是diff(exp(x)*cos(1001*x/1000),2)
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已知[img=114x30]1802e1b3d8c2e04.jpg[/img],f(x)的两阶导数的命令是diff(exp(x)*cos(1001*x/1000),2)