英语翻译in the following arithmetic progressions,the first three terms and the last term are given.find the number of terms.
问题描述：
英语翻译
in the following arithmetic progressions,the first three terms and the last term are given.find the number of terms.
答
in the following arithmetic progressions, the first three terms and the last term are given.find the number of terms. 意思是:
在下面一条数学题的解决程序中，最先3个程序和最後一个程序去已给出，请找出此题一共须要有多少个解决的程序?
答
在下面这个等差数列中,前三项和最后一项已经给出,求出这个等差数列的项数（就是这个数列里有多少个数字）.