[adsense:responsibe:9545213979]
Sage: var('al k') Sage: y=function('y',x) Sage: a1=[1-k,al+1] Sage: a2=[al-1,1-k] Sage: m=matrix([a1,a2]) Sage: r=m.determinant() Sage: solve(r==0,k) Resultado con Sagemath: [k == -sqrt(al^2 - 1) + 1, k == sqrt(al^2 - 1) + 1]
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