5.(2023•鼓楼区校级模拟)在矩形ABCDABCDABCD中,AB=3AB=3AB=3,BC=4BC=4BC=4.若AP=1AP=1AP=1,则BP→⋅BD→\overrightarrow{BP}\cdot \overrightarrow{BD}BP⋅BD的取值范围是((( )))