10计应331朱殷超1043323119

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1、Togetstarted,selectMATLABHelporDemosfromtheHelpmenu.Theelementtype"name"mustbeterminatedbythematchingend-tag"".Couldnotparsethefile:c:matlab7toolboxccslinkccslinkinfo.xml>>symsx>>y=sin(3*x)/tan(2*x)y=sin(3*x)/tan(2*x)>>symsx>>y=sin(3*x)/tan(2*x);l

2、imit(y,x,0)ans=3/2>>symsx>>y=arcsin(2*x)/x;limit(y,x,0)???Undefinedcommand/function'arcsin'.>>symsx>>y=x^2/(sin(x/2)^2);limit(y,x,0)ans=4>>symsx>>y=asin(2*x)/x;limit(y,x,0)ans=2>>syms'ans''x''y'>>symsx>>y=exp(sin(x*(1/2)));diff(y,x)ans=1/2*cos(1/2*x)*exp(sin(

3、1/2*x))>>symsx>>y=exp(sin(x^(1/2)));diff(y,x)ans=1/2*cos(x^(1/2))/x^(1/2)*exp(sin(x^(1/2)))>>symsx>>y=2*log(sinx);diff(y,x)???Undefinedfunctionorvariable'sinx'.>>y=2*log(sin(x));diff(y,x)ans=2*cos(x)/sin(x)>>symsx>>y=2^log(sin(x));diff(y,x)ans=2^log(sin(x))*c

4、os(x)/sin(x)*log(2)>>symsx>>y=log(x+(x^2+1)^(1/2));diff(y,x,2)ans=(-1/(x^2+1)^(3/2)*x^2+1/(x^2+1)^(1/2))/(x+(x^2+1)^(1/2))-(1+1/(x^2+1)^(1/2)*x)^2/(x+(x^2+1)^(1/2))^2>>symsxy>>f=sin(y)+x^3*y^2+x^4-sin(7);>>dfx=diff(f,x);dfy=diff(f,y);>>dy=-dfx/dfydy=(-3*x^2*y

5、^2-4*x^3)/(cos(y)+2*x^3*y)>>symsx>>f=(cos(x)^2-1)/sin(x)f=(cos(x)^2-1)/sin(x)>>symsx>>f=(cos(x)^2-1)/sin(x);int(f,x)ans=cos(x)>>symsx>>f=x/(2+x^2);int(f,x)ans=1/2*log(2+x^2)>>symsx>>f=1/(x*(log(x)^2+1));>>I1=int(f,x,1,exp)???Errorusing==>expNotenoughinputargu

6、ments.Errorin==>expat15[varargout{1:nargout}]=builtin('exp',varargin{:});>>symsx>>f=1/(x*(log(x)^2+1));>>I1=int(f,x,1,exp(1))I1=atan(log(3060513257434037)-50*log(2))>>symsx>>f=(x^2*sin(x)+2)/((1-x^2)^1/2);>>I1=int()f,x,-1/2,1/2)???I1=int()f,x,-1/2,1/2)

7、Error:

8、MissingMATLABoperator.>>symsx>>f=(x^2*sin(x)+2)/((1-x^2)^1/2);>>I1=int(f,x,-1/2,1/2)I1=4*log(3)