"Prove that the function   `f: N-N` , defined by `f(x)=x^2+x+1` is one-one but not
Channel: Doubtnut
Date: 2020-06-28

"Prove that the function
 
  `f: N-N`
 , defined by `f(x)=x^2+x+1`
 is one-one but not
 
  onto."