1. The take-off point from the input R(s) is equal to ------------------

2. The summing point has single--------------------

3. We replace dy / dt by ------------------.when convert to Laplace

4 .consist of multiple ---------------- .devices

5 . The difference between the input signal and output signal in the block diagram is the --------------.signal

6. The Laplace inverse of (35+6)/(s^2+3s) is ---------------

7 . If you have the feed-forward and feedback blocks in s domain Are (P+1) and (P-1) respectively, then the transfer function will be ------------------