Tuesday, 11 July 2023

Find the sum of first 30 terms of A.P -30, -24, -18, - - - .(cbse 2022)


 

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If find x. 1/(9!) + 1/(10!) = x/(11!).

  Here n! is read as n factorial. It can be written as n(n-1)! or n(n-1)(n-1)!