bonjour,
qqun saurait-il comment faire ce programme dans une TI-89 svp:
(c'est du maple)
en gros je cherche à resoudre det(M)=0 ou M est une matrice 4x4.> with(LinearAlgebra);
> Determinant(Matrix(4, 4, {(1, 1) = 2*T/a-m*l, (1, 2) = -T/a, (1, 3) = 0, (1, 4) = 0, (2, 1) = -T/a, (2, 2) = 2*T/a-m*l, (2, 3) = -T/a, (2, 4) = 0, (3, 1) = 0, (3, 2) = -T/a, (3, 3) = 2*T/a-m*l, (3, 4) = -T/a, (4, 1) = 0, (4, 2) = 0, (4, 3) = -T/a, (4, 4) = 2*T/a-m*l}));
print((5*T^4-20*T^3*m*l*a+21*T^2*m^2*l^2*a^ 2-8*T*m^3*l^3*a^3+m^4*l^4*a^4)/a^4 );
> solve((5*T^4-20*T^3*m*l*a+21*T^2*m^2*l^2*a^ 2-8*T*m^3*l^3*a^3+m^4*l^4*a^4)/a^4 = 0, l);
print((5/2+(1/2)*sqrt(5))*T/(m*a), (5/2-(1/2)*sqrt(5))*T/(m*a), (3/2+(1/2)*sqrt(5))*T/(m*a), (3/2-(1/2)*sqrt(5))*T/(m*a));
>
>
merci
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