00:01
In this problem, it is said that a few propositions are given as p is the proposition the user enters a valid password.
00:09
Q is the proposition access is granted and r is the proposition the user has paid the subscription fee.
00:15
Now we need to use these propositions to express the given sentences.
00:20
The first one is the user has paid the subscription fee but does not enter a valid password.
00:26
This means that the user has paid the subscription fee and he does.
00:30
Not enter a valid password.
00:32
So the user has paid the subscription fee.
00:35
That means r and, this is the symbol for n, he does not enter a valid password.
00:42
So p represents the user enters a valid password.
00:45
So not p will represent that he does not enter a valid password.
00:49
So we have r and not p.
00:52
The next sentence is access is granted whenever the user has paid the subscription fee and enters a valid password.
00:59
This means if the user has paid the subscription fee and enters a valid password, then access is granted.
01:05
So if the user has paid the subscription fee, that means r and, so this is the symbol for and, he enters a valid password, that is p.
01:13
If this, then, so that means r and p implies that access is granted.
01:19
And access is granted means q...