من طرف Three consecutive terms in an A.S., its middle term is 13. If we add 3 to the middle term and add 14 to the third then, they become in a G.S. then, find the three numbers.
نسعى لخلق جيل يفكر تفكيراً علمياً ليرفع مصر لمرتبة الدول الكبرى
عدد المساهمات : 146
