Which of the following statements are always true for any two setsA and B?

(a)

If A ?B, then A ?B.

(b)

If A ?B, then A ?B.

(c)

If A = B, then A ?B.

(d)

If A = B, then A ?B.

3.2.4

Let X = {a, b, c, d}. What is{ A: A ? P(X) and |A| = 2 }?

3.6.4

Express each set in roster notation. Express the elements asstrings, not n-tuples.

(a)

A²,where A = {+, -}.

(b)

Which of the following statements are always true for any twosets A and B?

(c)

(a)

If A ? B, then A ? B.

(b)

If A ? B, then A ? B.

(c)

If A = B, then A ? B.

(d)

If A = B, then A ? B.

3.2.4

Let X = {a, b, c, d}. What is{ A: A ? P(X) and |A| = 2 }?

3.6.4

Express each set in roster notation. Express the elements asstrings, not n-tuples.

(a)

A², where A = {+, -}.

(b)

A³, where A = {0, 1}.

A³,where A = {0, 1}.

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a If A B then A B True b If A B then A B False the reverse is not ... View the full answer