(1-cos(mx))(1+cos(mx))/(1-sqrt(1+x^2))(1+sqrt(1+x^2)) * (1+sqrt(1+x^2))/(1+cos(mx)). =-(sin(mx)/x)^2 * (1+sqrt(1+x^2))/(1+cos(mx)). 後者極限易算… See more. ... <看更多>
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(1-cos(mx))(1+cos(mx))/(1-sqrt(1+x^2))(1+sqrt(1+x^2)) * (1+sqrt(1+x^2))/(1+cos(mx)). =-(sin(mx)/x)^2 * (1+sqrt(1+x^2))/(1+cos(mx)). 後者極限易算… See more. ... <看更多>