roblem $2$: ctional area about the $x$ axis, $1.$

$I_x={\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}{y}^{2}dA,I_x=I_{x^1}+A{d}_y^3$

$I_x=I_{x_1}+I_{x_2}+I_{x_3}$roblem $2$: ctional area about the $x$ axis, $1.$

$I_x={\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}{y}^{2}dA,I_x=I_{x^1}+A{d}_y^3$

$I_x=I_{x_1}+I_{x_2}+I_{x_3}$

e moment of inertia of the beam's cross$-$

e moment of inertia of the beam's cross$-$