Question

Pretty easy question but I don’t understand I need help with the answers for a through c

Answer 1

Given:

The function is:

(b)

(c)

The function is:

$f(x)=|x|$

Find-:

The one-to-one function

Explanation-:

At x = 0 and x = 2 function value is isame then it is not 1-1 function

Because 1-1 function is same value at any value of "x" only one solution for function

Check for the second function.

Any only of x value of f(x) is unique, then it is a one-one function.

Check for function value is:

$f(x)=|x|$

At negative and positive values, the function is the same value.

So it is not a one-one function.