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The nth term of an arithmetic progression is 2n+1 , the sum of 1st n terms of the Arithmetic progression is..
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The nth term of an arithmetic progression is 2n+1 , the sum of 1st n terms of the Arithmetic progression is..

User Uneducatedguy
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Answer:

First tale nth term and find relation of a , d, n

Try yourself

User Rob Erskine
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