if the nth of an AP is 4n square - 5 then find the sum of the first 20 Terms.
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here is the answer in the picture
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crazyrider0046:
its for 3marks
ok
they won't give 3marks for this much, send in detail
ok later
u are in gseb or cbse
i will answer in detail after trying
ok bro
is it ok now bro
isn't it ?
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