# help with translations

Start by writing out what "translations" and "scalings" mean. If T is a translation, on $R^n$, say, then [tex]T(x_1, x_2, ..., x_n)= (x_1+ a_1, x_2+ a_2, ..., x_n+ a_n). A "scaling" is of the form $S(x_1, x_2, ..., x_n)= (ax_1, ax_2, ..., ax_n)$. Just do the calculations for TS and ST.