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4) Write down all the subsets of (a) {p, q}​

Sagot :

Answer:  

If P is a subset of Q, then by definition, every element of P is an element of Q. So, as Q contains P, every element in either P or Q is in Q, so the union is Q. For the second, every element of P and Q is in P, so the intersection is P.

Step-by-step explanation: