Let function NoFontMessage () {} jsMath = {Parser: {prototype: {environments: {'eqnarray*' :['Array',null,null,'rcl',[5/18,5/18],3,'D']}}}}; g(x)=1/(x+2) Find the expression

g(x+h)-g(x) / h

this is what i did:

g(x+h)-g(x) / h

=g(x)+g(h)-g(x)/ h

=1/(x+2)+g(h)-1/(x+2) / h

=g(h) / h

= g

is this right?