Question
Find the maximum or minimum values, if any, of the following functions without using the derivatives:
| x + 2 |
Solution
Let f(x) = | x + 2 |
Now | x + 2 | ≥ 0 ∀ x ∊ R
∴ f (x) ≥ 0 ∀ x∊ R
⇒ minimum value of f (x) is 0 and it has no maximum value.
