ケプラーの方程式　　exp(x)(x-1)=exp(-x)(x+1)

→ｘ＝1.1996678640257734・・・

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exp(x)(x-1)=exp(-x)(x+1)

(x-1)(1+x+x^2/2)=(x+1)(1-x+x^2/2)

(x+x^2+x^3/2)-(1+x+x^2/2)=(x-x^2+x^3/2)+(1-x+x^2/2)

2x^2=(2+x^2)

x^2=2

x=√2

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