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Please explain how the solve the problem in image .......#..........!.......

Sudhanva G V , 7 Years ago
Grade 11
anser 1 Answers
Arun
Dear student
 
T20 = 1 + 2+ 3+.....+20 /20 = 20* 21/2*20= 21/2
 
Now
 
S210 = sigma (210)
 
 = 21/2 * 20 = 210
 
Hope it helps
Last Activity: 7 Years ago
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