CBSE Class 11-science Answered
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Asked by Kchawla94 | 03 Mar, 2019, 21:20: PM
![let space the space series space be
straight a comma space straight a plus straight c comma space straight a plus 2 straight c comma space straight a plus 3 straight c.......
it space is space an space AP
common space difference space equals space straight c
straight S subscript straight n equals straight n over 2 open parentheses 2 straight a plus open parentheses straight n minus 1 close parentheses straight c close parentheses
straight S subscript straight n minus 2 end subscript equals fraction numerator straight n minus 2 over denominator 2 end fraction open parentheses 2 straight a plus open parentheses straight n minus 2 minus 1 close parentheses straight c close parentheses
rightwards double arrow straight S subscript straight n minus 2 end subscript equals fraction numerator straight n minus 2 over denominator 2 end fraction open parentheses 2 straight a plus open parentheses straight n minus 3 close parentheses straight c close parentheses
straight S subscript straight n plus 2 end subscript equals fraction numerator straight n plus 2 over denominator 2 end fraction open parentheses 2 straight a plus open parentheses straight n plus 2 minus 1 close parentheses straight c close parentheses
rightwards double arrow straight S subscript straight n plus 2 end subscript equals fraction numerator straight n plus 2 over denominator 2 end fraction open parentheses 2 straight a plus open parentheses straight n plus 1 close parentheses straight c close parentheses](https://images.topperlearning.com/topper/tinymce/cache/d2c37595a6b9ceee4bbc64af6b58d373.png)
Answered by Arun | 05 Mar, 2019, 09:14: AM
CBSE 11-science - Maths
Asked by Kchawla94 | 03 Mar, 2019, 21:20: PM
CBSE 11-science - Maths
Asked by Vipul009sharma | 13 Jan, 2019, 00:14: AM
CBSE 11-science - Maths
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CBSE 11-science - Maths
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