mind Mapping
- Make and use the FIG mind, the aim is to illustrate: Numbers by various common construction method columns of the modified term formulas, the definition of the final point arithmetic progression \ (a_ {n + 1} -a_n = d \) or geometric sequence definition \ (\ frac {a_ {n + 1}} {a_n} = q \) of \ (A_N \) a \ ( '\) connotation \ (' \) .