The first and the last term of an AP are 7 and 49 respectively. If sum of all its terms is 420 find

Просмотров: 1 | Время: 02:57 | Голосов: +1 +1 | Скачать

Скачать клип The first and the last term of an AP are 7 and 49 respectively. If sum of all its terms is 420 find