Answer:
(A)
Step-by-step explanation:
Given a set with "n" number of elements, the collection of all subsets of the set is referred to as the Power set of the given set.
To find the number of possible subsets of any set, we use the formula:
Take for example the set: A={2,3,4)
A has 3 elements, therefore n=3
The number of possible subsets of A is:
7 ft²
The formula for this is given in the problem
Plug in the given values
1/2 * 2 (4+3)
1*7
Its a triangle .And the question says triangular