Answers

2015-02-09T16:35:56+05:30
S11=19
11f+61d=19
s19=11
19f+381 d=11
(11f+61d)19=361
209f+1159d=361
(19f+381d)11=121
209f+4191d=121
209f+1159d=361-
209f+4191d=121
= -3032d=240
d=240/-3032
d=0.079
now you can do it



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