Question 21

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Jambmaths question: 

$\begin{align}  & \text{If a binary operation }*\text{ is defined by   }x*y=x+2y,\text{ find }2*(3*4) \\ & (A)\text{ }26\text{  }(B)\text{ }24\text{ }(C)\text{ }16\text{  }(D)\text{ }14 \\\end{align}$

Jamb Maths Solution: 

$\begin{align}  & \text{Given the binary operation that }(x*y)=x+2y \\ & 3*4=3+2(4)=11 \\ & 2*(3*4)=2*11=2+2(11)=24 \\ & 2*(3*4)=24 \\\end{align}$

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