华亭发电公司发电运行部绩效考评实施细则华亭发电有限责任公司发电运行部绩效考评实施细则1华亭发电公司发电运行部绩效考评实施细则前言本...
1:写出下列数列的一个通项公式:,,,,1913711,311,151,71,31,1)2(,63,51,43,31,23,1)3(7777.0,777.0,77.0,7.0)4...
._________:),274(:)172.._____,38,203._______,30,240,18S2._______,,21}1.{a1111324911110nbannnSSSnaSaS...
121234534511111nnaaaaa1.数列{a}是各项为正数的等比数列,a+a=2(+),a+a+a=64(++),求{a}的通项公式.1234531234531{},,16111111,______4naaaa...
等差、等比数列的前n项和的公式等差数列求和公式121111()()221(1)2nnnSnaanaanannd)1(...