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An AP has 21 terms the sum of 10th,11th and 12th terms of an AP is 129 and sum of the last 3 terms is 237. find the AP.
Pls solve it..... fast, it's urgent.
Thx
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4
HEY mate here is your answer.
hope it helps you.
hope it helps you.
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Anonymous:
my pleasure
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2
it would be helpful to you
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hey there was a mistake in my solution there was 237 and i solve fir 231 so correct this . bt method is same for any question of this type
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