Browse Questions

# If $*$ is a binary operation defined as $a*b=3a-b$, then $(2*3)*4=$ ?

$\begin{array}{1 1} 2 \\ 3 \\ 4 \\ 5 \end{array}$

$2*3=6-3=3$
$(2*3)*4=3*4=9-4=5$