lim*(1+2+...+n) is equal to is equa...
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lim*(1+2+...+n) is equal to is equal to :

JEE/Engineering Exams
Maths
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D ( lim _{n rightarrow infty} frac{1}{n^{2}}left(1+2+frac{1}{n}right) ) ( Rightarrow sum_{n rightarrow infty} frac{1}{n^{2}} frac{n(n+1)}{2} Rightarrow frac{4 sqrt{5} cdot 5 cdot n^{2}}{n+10} )
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