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sammy [17]
3 years ago
14

Find the sum of the first 20terms of this arithmetic progression: 2,5,8,11,.......​

Mathematics
1 answer:
postnew [5]3 years ago
8 0
Y = -1 + 3x... y1= 2, y2=5... so the 20th term will be 59. There will be ten pairs (i.e 2,59 equal 61... 5,56 equal 61) so multiply this 61 by 10 and your sum will be 610
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Volgvan

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