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weqwewe [10]
3 years ago
6

Evaluate the summation of 2n+5 from n=1 to 12 29 36 216 432

Mathematics
1 answer:
rewona [7]3 years ago
3 0
\bf \sum\limits_{n=1}^{12}\ 2n+5\implies \sum\limits_{n=1}^{12}\ 2n+\sum\limits_{n=1}^{12}\ 5\implies 2\sum\limits_{n=1}^{12}\ n+\sum\limits_{n=1}^{12}\ 5
\\\\\\
2\cdot \cfrac{12(12+1)}{2}+(12\cdot 5)\implies 156+60\implies 216
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