Question

Prove that the function f RR given by f(x) = 2x is 1-1 and onto
explain step by step ​

Answer 1

Answer:

br> A function is a one-one function such that

only if

.<br> Here,

<br>

<br> If

, then,<br>

<br>

is one-one function.<br> Now, for any value of

, we have a different value of

. That means,

is onto function also.<br>