A.\(\int\limits_a^c {f\left( x \right)dx} + \int\limits_c^b {f\left( x \right)dx} = \int\limits_a^b {f\left( x \right)dx} ,\,\,c \in \left( {a;b} \right)\)
B.\(\int\limits_a^b {f\left( x \right)dx = \int\limits_a^b {f\left( t \right)dt} } \)
C.\(\int\limits_a^a {f\left( x \right)dx = 1} \)
D.\(\int\limits_a^b {f\left( x \right)dx = - \int\limits_b^a {f\left( x \right)dx} } \)