We've been doing proving limits and sequences in class and have been given this as one of the practice questions.

prove lim 1/sqrt(n)=0

I've done |1/sqrt(n)-0|=1/sqrt(n)<E so N(E)=[1/E^2]+1 but that seems waaay to simple to the ones we did before, is there another way of doing this or that literally all I need to do?