P = {1, 2, 3, 4}, Q = {4, a} এবং R = P ∩ Q হলে R × Q = কত?

প্রশ্ন: P = {1, 2, 3, 4}, Q = {4, a} এবং R = P ∩ Q হলে R × Q = কত?

সমাধান:
দেওয়া আছে,
P = {1, 2, 3, 4}, এবং Q = {4, a}
∴ R = P ∩ Q
= {1, 2, 3, 4} ∩ {4, a}
= {4}

∴ R × Q = {4} × {4, a}
= {(4, 4), (4, a)}