Answer :

Given:

a graph of the function is given.

Find:

To find the value of a at which function f(x) is discontinuous.

Explanation:

we know a function f(x) is said to be continuous , if one can draw the graph of the function continuously without lifting the pen, and if the graph of the function breaks at some point, that point is known as point of discontinuity.

From the given graph, it is clear that the graph of the function f(x) is discontinuous at x = -1,.

Conclusion:

therefore the value of a is -1.