谁能帮我用excel或origin拟合下面公式的图,求出a,b,c.y=a/(x*tanh(x/b) )-c/x^2,点有(0.04.0.0193),(0.27.0.0110),(0.55,0.00664),(0.77,0.00487),(1.5,0.00255)

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