Math, asked by saniyagunnapur2005, 2 months ago

the sum of first 20 terms of an ap is 420 and the sum of first 19 terms of the same arithmetic progression is 400 then its 20th term is​

Answers

Answered by unique327
2

Let a be the first term and d be the common difference of the given A.P.

And the sum of the first 20 terms be S(20).

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