A: syms x; limit(tan(x)/(2*x))ans =1/2
B: syms x; limit(tanx/(2*x))ans =1/2
C: limit(tanx/(2*x),x,0)ans =1/2
举一反三
- 计算[img=92x41]17da61001961fe7.png[/img]实验命令为(). A: limit(x*log(1+2/x),inf)ans =2 B: syms x; limit(x*log(1+2/x),inf)ans =2 C: syms x; limit(x*log1+2/x,inf)ans =4
- 17da555a3275fb2.png,计算极限的实验命令为(). A: limit((x-sin(x))/x^3,x,0)ans =1/2 B: syms x; limit((x-sin(x))/(x.^3),x,0)ans =1/6 C: syms x; limit(x-sinx)/x^3,x,0)ans =1/6
- 计算 [img=97x44]17da60e3e6579e9.png[/img]实验命令为(). A: limit(log(x^2-3)/(x^2-3*x+2),2)ans =4 B: syms x; limit(log(x^2-3)/(x^2-3*x+2),2)ans =4 C: syms x; limit(logx^2-3/(x^2-3*x+2),x,2)ans =4
- 17da52a3e27ca7e.png,计算极限的实验命令为(). A: syms a x; limit((a^x-1)/x)ans =log(a) B: limit((a^x-1)/x)ans=a C: syms x; limit((a^x-1)/x)ans =log(a)
- 计算[img=88x44]17da60f638f2d11.png[/img]实验命令为(). A: limit((x^2+log(x))/(x*log(x)),+inf)ans =Inf B: syms x; limit((x^2+logx)/(x*log(x)),x,+inf)ans =NaN C: syms x; limit((x^2+log(x))/(x*log(x)),x,+inf)ans =Inf
内容
- 0
求变上限函数[img=72x35]17da5f1066e9acf.png[/img]对变量x的导数,实验命令是(). A: diff(int(sqrt(a+t),t,x,x^2))ans =2*x*(x^2 + a)^(1/2) - (a + x)^(1/2) B: syms a t; diff(int(sqrt(a+t),t,x,x^2))ans =2*x*(x^2 + a)^(1/2) - (a + x)^(1/2) C: diff('int(sqrt(a+t)','t',x,x^2))ans =2*x*(x^2 + a)^(1/2) - (a + x)^(1/2)
- 1
在Matlab中求[img=123x44]18030b2956167b1.png[/img]极限的命令是（ ） A: syms x; limit(‘(tanx-sinx)/sin2x^3’,x,0) B: syms x; limit(‘(tanx-sinx)/(sin2x)^3’,x,0) C: syms x; limit(‘(tan(x)-sin(x))/(sin(2*x))^3’,x,0) D: syms x; limit(‘(tan(x)-sin(x))/(sin2x)^3’,x,0)
- 2
【单选题】在 MATLAB 命令窗口中 , 键入命令 syms x ; int(x*sin(x)) 。结果是 A. ans= sin(x)-x*cos(x) B. ans= cos(x)+x*sin(x) C. ans= sin(x)-cos(x) D. ans= -1/2*cos(x)*sin(x)+1/2*x
- 3
实验命令“syms x y a, limit(limit(sin(x*y^3)/(x*y^2),x,0),y,a)”的结果为【】. A: 0; B: 1; C: a; D: 无结果.
- 4
实验命令“syms x y a, limit(limit(sin(x*y^3)/(x*y^2),x,0),y,a)”的结果为【】.