Question 21

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Jambmaths question: 

The binary operation* is defined on the set of integers such that $p*q=pq+p-q$. Find $2*(3*4)$

Option A: 

11

Option B: 

13

Option C: 

18

Option D: 

22

Jamb Maths Solution: 

$\begin{align}  & 3*4=3\times 4+3-4=11 \\ & 2*(3*4)=2*11=2\times 11+2-11=13 \\\end{align}$

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