Question

If the binary operation $\ast$ is defined on a set of integers as $a\ast b=a+3b^2$ , then the value of $2\ast 3$ is

• A. $27$
• B. $29$
• C. $2$
• D. None of these

Answer 1

The correct option is B $29$

$a\ast b=a+3b^2$

$\Rightarrow 2\ast 3=2+3(3{)}^2$

$=2+27$

$=29$