Question

$A:\{-1,0,2,5,6,11\},B=\{2,-1,1,0,11,108\}$ and $f(x)=x^2-x-2$, then $f:A\to B$ is

• A. a function
• B. a one-one
• C. an onto
• D. not a function

Answer 1

Answer: (D)

Range of $f=\{0,-2,18,28,108\}$ is not subset of $B\Rightarrow f$ is not a function