Math, asked by sharmashobha474, 10 months ago

please help me in AP question ​

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ranaarun2611: can u just tell me what is the answer of this of question...is it 7n+1/2????

Answers

Answered by amanali21
0

use the formula

sn=n/2(2a+(n-1)d)

sharmashobha474: bro can't you solve and send a pic Iam not able to solve this problem even after using the formula please im in 10 and this year I have boards so please
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