Question

find the sum (5-2/n) ,( 5-4/n), (5-6/n) .. upto 100 terms
it looks like a= 5 , D= -2/n
please solve this and tell me the answer​

Answer 1

Answer:

(i) Here, there are five odd numbers. Therefore square of 5 is 25. 1 + 3 + 5 + 7 + 9 = 5^252

= 25

(ii) Here, there are ten odd numbers. Therefore square of 10 is 100. 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 = 10^2102= 100

(iii) Here, there are twelve odd numbers. Therefore square of 12 is 144.

1 + 3 +5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23 = 12^2122 = 144