ContourPlot3D[{z==5*x^2+5*y^2,z==6-7*x^2-7*y^2},{x,-5,5},{y,-5,5},{z,-5,10},Axes->True,Boxed->False]
s+i
f[x_,y]=5*x^2+5*y^2;
g[x_,y]=6-7x^2-y^2;
s1=Solve[f[x,y]==g[x,y],y]
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s2=Solve[s1[1,2,3]==0,x]
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আরেকটু আছে
৩b
a=2*i-j+k;
b=i-3*j-5*k;
c=3*i-4*j-4*k;
u1=2;u2=-1;u3=1;
v1=1;v2=-3;v3=-5;
w1=3;w2=-4;w3=-4;
u={u1,u2,u3};
v={v1,v2,v3};
w={w1,w2,w3};
v.cross[u,w]
is+