Check the injectivity and surjectivity of the following functions:(i) `f : N -N`given by

Check the injectivity and surjectivity of the following functions:(i) `f : N -N`given by `f(x)=x^2`(ii) `f : Z-Z`given by `f(x)=x^2` (iii) `f : R -R`given by `f(x)=x^2`(iv) `f : N- N`given by `f(x)=x^3`(v) `f : Z → Z` given by `f(x) = x^3`

[mahisagani]

I think f(-1) is -1, so the function is one to one in the 5 th question

[rohansharma]

Kl paper h or ye solutions he galat daal rakhe h

[premchaudhary]

agli baar axese study karke video banao vaiya, qon ki bahut se students ki ummide judi hoti hai apki video par...