Given:
To find: the domain of the given function
Explanation: So the domain of a function consists of all the first elements of all the ordered pairs, i.e., x, so we have to find the values of x to get the required domain
let,
f(x) =
Now for real value
a2-x2≥0
⇒ x2≥ a2
⇒ x≥±a
Or –a ≤ x ≤ a
Hence the domain of given function is = [-a, a]
So, the correct answer is option (B)