Bilingual Math:英汉双语数学.数列周测9

（南宁三中  许兴华数学）

Bilingual Math:英汉双语数学.数列周测9

Math Weekly Test of Grade One (9th)

(Produced by Xxhmath / checked by Steven) Jun 6th,2018

Note: A.P.(等差数列)，G .P.（等比数列）.

ONE. Multiple choice(6X10=60 points)

5.The sequence {2n＋1} is arranged as the following:The first term  is the first group，the 2th term and the 3th is the second group,……，i.e. ：(3) ,(5，7) ,(9，11，13), (15，17，19，21), (23), (25，27), (29，31，33), (35，37，39，41),……,in this way ,then the sum of  all numbers of  the 60th  blank is (              )

A．1112          B．1168        C．1176          D．1192

THERE. Answer the following questions  detailedly : (20poins)

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