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CBSE Class 11-science Answered

Please solve the following question.
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Asked by Kchawla94 | 28 Feb, 2019, 02:19: PM
answered-by-expert Expert Answer
The sequence : -5  4  9  5  -4  -9  -5  4  9  5  -4  -9 -5  4  9  5  -4  -9 .....................etc
 
It can be seen that 6 terms -5  4  9  5  -4  -9 are repeating in sequence.  Sum of these numbers is zero.
 
In 100 terms, sum of first 96 terms will be zero.  Remaining 4 terms are -5 4 9 5 and sum of these 4 numbers is 13.
 
Hence sum of 100 terms in sequence is 13
Answered by Thiyagarajan K | 28 Feb, 2019, 02:49: PM

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