[理工] ODE
x^2y''+xy'+(x^2-1/16)y=0
解答用級數展開
ans:y=C1x^(-1/4)[1-x^2/3+x^4/42+...]+C2x^(1/4)[1-x^2/5+...]
是否可以直接寫成
y=C1J(1/4)(x)+C2J(-1/4)(x)
就是直接用bessel function的形式去表達???
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