Given:

To find:
The value of
.
Solution:
We know that,
...(i)
Where n is an integer.
We have,

Using (i), it can be written as


It is given that
.


Therefore, the value of the given function expression is
.
Answer:
D) 3/15
Step-by-step explanation:
(-2/5) - (-9/15) = (-6/15) - (-9/15) = (-6/15) + (9/15) = 3/15