Question
Let * be a binary operation defined on $\mathbb{R}$ by $a * b = \frac{a + b}{4}$, where $a, b \in \mathbb{R}$. Then the operation * is:
Let * be a binary operation defined on $\mathbb{R}$ by $a * b = \frac{a + b}{4}$, where $a, b \in \mathbb{R}$. Then the operation * is: