Assumption:f(x)=x^2+2x
how to solve f(x+1) according the assumption.
this question is going to be asked has been done several times by me but no answere is sent,but i do it again:
f(x)=sqrt(x+1)→domain(f):[1,+∞),range(f);[0,+∞)
how to solve them at the maple15
