x=e^-t y=∫(0到t)ln(1+u^2)du求 d2y/dx2|t=0

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x=e^-t y=∫(0到t)ln(1+u^2)du求 d2y/dx2|t=0
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x=e^-t y=∫(0到t)ln(1+u^2)du求 d2y/dx2|t=0
x=e^-t y=∫(0到t)ln(1+u^2)du
求 d2y/dx2|t=0

x=e^-t y=∫(0到t)ln(1+u^2)du求 d2y/dx2|t=0