300+302+304+306+308+...+3000+3002+3004+3006+3008

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/17 11:54:34

300+302+304+306+308+...+3000+3002+3004+3006+3008
300+302+304+306+308+...+3000+3002+3004+3006+3008

300+302+304+306+308+...+3000+3002+3004+3006+3008
项数是(3008-300)/2=1354
和为 (300+2008)*1354/2=1562516

项数:(3008-300)÷2+1=1355
300+302+304+306+308+...+3000+3002+3004+3006+3008
=(300+3008)X1355÷2
=2241170