一共六组解,如下：{a -> 1.60329,b -> -0.255657,c -> 0.396715,d -> -27.3804},{a -> 5.2886,b -> -0.794223,c -> -3.2886,d -> -8.81364},{a -> -3.2886,b -> -8.81364,c -> 5.2886,d -> -0.794223},{a -> 0.39671...