Question

solve this queation without adding- 1+3+5+7+9+11+13+15+17​

Answer 1

Answer:

72 answer hoga

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Answer 2

Answer:

count them. they are 9 i.e. n=9

since all are odd

therefore sum of odd no. = n^2

== 9^2

= 81

you can also solve it by using AP

if you don't know please tell me

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