Show that addition and multiplication are associative binary operation on R. But subtraction is not associative on R. Division is not associative on R*.

Explanation

To show that addition and multiplication are associative binary operations on the set of real numbers \( \mathbb{R} \), while subtraction and division are not associative, we will follow these steps:

### Step 1: Define Associativity
A binary operation \( * \) on a set is said to be associative if for all elements \( a, b, c \) in the set, the following holds:
\[ a * (b * c) = (a * b) * c \]

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