20 lines
328 B
Plaintext
20 lines
328 B
Plaintext
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#zad1
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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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b=[7;1;4;6];
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A\b
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#zad2
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syms x
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solve(x^3-21*x+20==0,x)
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#zad3
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x=-2.0:0.05:2;
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y=-2.0:0.05:2;
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plot(x,x.^2-2*x+3);
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plot(x,cos(2*x),"+k");
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plot(x,sin(1./x),"*b");
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grid on
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x=-2:0.1:2;
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y=-2:0.1:2;
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[xx,yy]=meshgrid(x,y);
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mesh(xx, yy, xx.^2+yy.^2)
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mesh(xx, yy, xx.^2-yy.^2 + 2*x.*y.^2+1)
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