JAMB - Mathematics (2002 - No. 21)
The binary operation * is defined on the set of integers p and q by p*q = pq + p + q. Find 2 * (3 * 4).
59
19
67
38
Paliwanag
\(p \ast q = pq + p + q\)
\(2 \ast (3 \ast 4) \)
\(3 \ast 4 = 12 + 3 + 4 = 19\)
\(2 \ast 19 = 38 + 2 + 19 = 59\)