A function `f : RrarrR` is defined as `f(x) = x^(2) +2`, then evaluate each of the following :
(i) `f^(-1)(-6)` (ii) `f^(-1)(18)`

Explanation

To solve the problem step by step, we need to evaluate the function \( f(x) = x^2 + 2 \) and find the inverse function values for \( f^{-1}(-6) \) and \( f^{-1}(18) \).

### Step 1: Understand the function and its inverse
The function is defined as:
\[ f(x) = x^2 + 2 \]
To find the inverse, we first set \( f(x) = y \):
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