one more.....
2 views
Skip to first unread message
Jennifer ^.^
Nov 22, 2010, 11:03:46 AM11/22/10
to Byjus_cet_1st_yr_class
one more sum sir-----
>>S1, S2, S3……………Sn are the sums of n infinite geometric progressions. The first terms of these progressions are 1, 22-1, 23-1, ….., 2n- 1 and the common ratios are ½, ½2 ,1/23, ……. 1/2n. Calculate the value of S1 + S2 + S3 +……….+ Sn .
the first terms are actually 1, 2 squared -1, 2 cubed -1.......... 2
power n -1......
>>S1, S2, S3……………Sn are the sums of n infinite geometric progressions. The first terms of these progressions are 1, 22-1, 23-1, ….., 2n- 1 and the common ratios are ½, ½2 ,1/23, ……. 1/2n. Calculate the value of S1 + S2 + S3 +……….+ Sn .
the first terms are actually 1, 2 squared -1, 2 cubed -1.......... 2
power n -1......
Arjun Mohan
Nov 22, 2010, 12:15:18 PM11/22/10
to byjus_cet_1...@googlegroups.com
Try factorizing. This will get reduced to 2 + 2^2 + 2^3 ............. + 2^n
You know the answer now :)
--
If ignorance is bliss,why do we seek knowledge?
If ignorance is bliss,why do we seek knowledge?
Reply all
Reply to author
Forward
0 new messages