In each of the following cases, state whether the function is one-one, onto or bijective. Justify your answer.
(i) `f : R->R ,`defined by `f (x) = 3 - 4x`
(ii) `f : R->R ,`defined by `f(x) =1+x^2`

Explanation

To determine whether the given functions are one-one, onto, or bijective, we will analyze each function step by step.

### (i) Function: \( f : \mathbb{R} \to \mathbb{R} \) defined by \( f(x) = 3 - 4x \)

**Step 1: Check if the function is one-one (injective)**

To check if the function is one-one, we need to see if \( f(x_1) = f(x_2) \) implies \( x_1 = x_2 \).

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