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Bingel [31]
3 years ago
13

Evaluate the sum from n equals five to nine of quantity three n plus two

Mathematics
1 answer:
goldfiish [28.3K]3 years ago
6 0

Answer:

The given expanded sum of the series is \sum\limits_{n=5}^{9}3n+2=115

Step-by-step explanation:

Given problem can be written as

\sum\limits_{n=5}^{9}3n+2

To find their sums:

Now expanding the series

That is put n=5,6,7,8,9 in the given summation

\sum\limits_{n=5}^{9}3n+2=[3(5)+2]+[3(6)+2]+[3(7)+2]+[3(8)+2]+[3(9)+2]

=[15+2]+[18+2]+[21+2]+[24+2]+[27+2]

=17+20+23+26+29  (adding the terms)

=115

Therefore \sum\limits_{n=5}^{9}3n+2=115

Therefore the given sum of the series is \sum\limits_{n=5}^{9}3n+2=115

The given expanded sum of the series is \sum\limits_{n=5}^{9}3n+2=115

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