1.

ldots %2B 10/2 %2B 7 %2B 14 %2B 84

Answer»

So herea= 7l= 84d= 3.5Sum= n/2(a+l)so 23/2(7+84)23/2*91= 1046.5

NowTn= a+(n-1)d84= 7+(n-1)3.577= 3.5n-3.580.5/3.5= nn= 23

1046.5 is the universal answer.......



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