1.

Sum of n terms of series ab+(a+1)(b+1)+(a+2)(b+2)+....+(a+(n-1))(b+(n-1)) if ab=16 and(a+b)=13, is

Answer»

Sum of n terms of series
ab+(a+1)(b+1)+(a+2)(b+2)+....+(a+(n-1))(b+(n-1))
if ab=16 and(a+b)=13, is



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