Final answer:
To express the system specifications, we can use the logical connective ∧ to represent the conjunction of two conditions: the user paying the subscription fee and entering a valid password.
Step-by-step explanation:
To express the system specifications using propositions and logical connectives, we can break it down into two conditions: the user paying the subscription fee and entering a valid password. Let's represent these conditions as P and Q, respectively. The system specification can be expressed as the conjunction of these two conditions: P ∧ Q. This means that access is granted only if both conditions are true.