Question

If $f:R\to R$ defined by $f(x)=x$ if $x>2$, $f(x)=5x-2$ if $x\le 2$ then f is

• A. a function
• B. one one
• C. onto
• D. one one and onto

Answer 1

Answer: (C)

$f(2)=f(8)\Rightarrow f$ is not one-one