1.

If Un=∣∣∣∣∣n15n22N+12N+1n33N23N+1∣∣∣∣∣ and N∑n=1Un=λN∑n=1n2, then the value of λ is

Answer»

If Un=

n15n22N+12N+1n33N23N+1

and Nn=1Un=λNn=1n2, then the value of λ is





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