IF AND ONLY IF (IFF abbreviated). The symbol for IFF is . Also remember that ^ means AND while V means OR. Since the original statement says The temperature is not 90° if and only if the air conditioner is not working, or the apartment is not hot. The symbolic form will have (predicate 1 IFF predicate 2) OR predicate 3 where you replace predicates, IFF, and the OR with their symbols. 3.3, #18 You are on the right track. The p - ~r column is not correct. Remember that - will be T unless you have T - F. Also you will need to add a column for ~r. 3.5, #44 You

Question

IF AND ONLY IF (IFF abbreviated). 
The symbol for IFF is <-->.

Also remember that ^ means AND while V means OR.

Since the original statement says

The temperature is not 90° if and only if the air conditioner is not working, or the apartment is not hot.

The symbolic form will have
 (predicate 1 IFF predicate 2) OR predicate 3
where you replace predicates, IFF, and the OR with their symbols.


3.3, #18
You are on the right track. The p -> ~r column is not correct. Remember that -> will be T unless you have T -> F.
Also you will need to add a column for ~r.


3.5, #44
You

anonymous · Answer

need help to put them in a truth table