Examine the continuity of the function f (x) = 2x2 – 1 at x = 3.
The given function is f(x) = 2x2 – 1
At x = 3, f(x) = f(3) = 2 × 32 – 1 = 17
= 2 × 32 – 1 = 17
Thus, 
Therefore, f is continuous at x = 3
10
Examine the continuity of the function f (x) = 2x2 – 1 at x = 3.
The given function is f(x) = 2x2 – 1
At x = 3, f(x) = f(3) = 2 × 32 – 1 = 17
= 2 × 32 – 1 = 17
Thus,
Therefore, f is continuous at x = 3