X=arctant,y=ln(1+t^2),y=y(X),求d^2y/dX^2(即求y的二阶导数)

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X=arctant,y=ln(1+t^2),y=y(X),求d^2y/dX^2(即求y的二阶导数)
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X=arctant,y=ln(1+t^2),y=y(X),求d^2y/dX^2(即求y的二阶导数)
X=arctant,y=ln(1+t^2),y=y(X),求d^2y/dX^2(即求y的二阶导数)

 

X=arctant,y=ln(1+t^2),y=y(X),求d^2y/dX^2(即求y的二阶导数)