Xaqiijinta fahamka taxanaha xisaabta

Casharkani wuxuu kaa caawinayaa inaad fahamto sida loo guud-gaar-gaareeyo taxanaha xisaabeed (arithmetic sequences). Waa inaad horey u garanaysaa sida loo helo farqiga guud (common difference) iyo sida taxanaha tooska ah (linear sequences) u shaqeeyaan.