61 lines
715 B
Plaintext
61 lines
715 B
Plaintext
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mathics
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1.
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Solve[{2x-2y+z-w==7,-x+4y-5z+3w==1,x+y-z+w==4,-4x+2y+z-2w==6},{x,y,z,w}]
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2.
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Solve[{x^3-21*x+20==0},{x}]
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3.
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Plot[ x^2-2*x+3, {x , 0 , 15}]
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4.
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Plot[ Cos[2*x], {x,-1,1}]
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5.
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Plot[Sin[1/x], {x,1,3}]
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6.
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7.
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octave
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1.
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A = [2 -2 1 -1; -1 4 -5 3;1 1 -1 1;-4 2 1 -2];
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f = [7 1 4 6];
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u = A\f'
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2.
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c = [1 0 -21 20];
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roots(c)
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3.
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x=[-3:1:10];
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y=x^2-2*x+3;
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plot(x,y,".c")
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4.
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x=[0:0.1:10]
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y=cos(2*x)
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plot(x,y,"-g")
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5.
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x=[-3:0.1:10];
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y=sin(x.^(-1));
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plot(x,y,"-y")
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6.
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x = -2.0:1:2;
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y = -2.0:1:2;
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[X,Y]=meshgrid(x,y);
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mesh(X,Y,X.^2+Y.^2)
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7.
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x=-2:1:2;
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octave:67> y=-2:1:2;
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octave:68> [X,Y]=meshgrid(x,y);
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octave:69> mesh(X,Y,X.^2-Y.^2+2*X*Y.^2+1)
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