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我需要找到通过取以下矩阵的行列式形成的超越方程的根。如您所见，它充满了贝塞尔函数。我厌倦了使用“fzero”命令，但它不起作用。所有贝塞尔函数输入，如 gamma 和 eta 都是 beta 的函数。

A= [besselj(0,gamma1) -besselj(0,eta1*a/b) -bessely(0,eta1*a/b) 0 0 0 0;
    K1*besselj(1,gamma1) -besselj(1,eta1*a/b) -bessely(1,eta1*a/b) 0 0 0 0;
    0 besselj(0,eta1) bessely(0,eta1) -besselj(0,gamma2) -bessely(0,gamma2) 0 0;
    0 K2*besselj(1,eta1) K2*bessely(1,eta1) -besselj(1,gamma2) -bessely(1,gamma2) 0 0;
    0 0 0 besselj(0,gamma2*c/b) bessely(0,gamma2*c/b)  -besselj(0,eta2) -bessely(0, eta2); 
    0 0 0 K3*besselj(1,gamma2*c/b) K3*bessely(1,gamma2*c/b) -besselj(1,eta2) -bessely(1,eta2);
    0 0 0 0 0 besselj(1,eta2*d/c)-H*besselj(0,eta2*d/c), bessely(1,eta2*d/c)-H*bessely(0,eta2*d/c);];

请让我知道如何找到主题超越方程的值根。谢谢

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