phương trình nào sau đây là phương trình đúng A. { X R ( t ) = − X R * ( t ) X I ( t ) = X I * ( t )

$\{\begin{array}{c}X{}_R\left(t\right)=-X{}_R^{\text{*}}\left(t\right)\\ X{}_I\left(t\right)=X{}_I^{\text{*}}\left(t\right)\end{array}$B. $\{\begin{array}{c}X{}_R\left(t\right)=X{}_I^{\text{*}}\left(t\right)\\ X{}_I\left(t\right)=X{}_R^{\text{*}}\left(t\right)\end{array}$

$\{\begin{array}{c}X{}_R\left(t\right)=X{}_R^{\text{*}}\left(t\right)\\ X{}_I\left(t\right)=-X{}_I^{\text{*}}\left(t\right)\end{array}$

$\{\begin{array}{c}X{}_R\left(t\right)=-X{}_I^{\text{*}}\left(t\right)\\ X{}_I\left(t\right)=X{}_R^{\text{*}}\left(t\right)\end{array}$