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A class has n rows of chairs, with n chairs in each row. The chairs in each row are numbered through 1 to n. Find a formula in terms of n for the number of chairs with odd number.

Prince Sehrawat , 6 Years ago
Grade 12th pass
anser 1 Answers
Arun

Last Activity: 6 Years ago

Dear student
 
if the chairs are like 1, 3, 5, 7....
 
then 1 + 3 + 5 + 7+ …...+ (2n – 1)
 
 = n/2 ( 1 + 2n – 1) = n2
 
Hope it helps
 
Regards
Arun

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