1.

Letf : N to Rbe a function satisfying the following conditions: f(1) =1 and f(1) +2f( 2)+ 3 f(3) + ………n f(n )""f(n ) = n (n+1) , f(n) "for " n ge 2 f(1), f(2) , f(3) , f(4) ,…………. represent a series of

Answer»

an AP
a GP
an HP
an arithmetico-geometric progression

Answer :C


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