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a-1-1-a-n-1-a-n-a-n-n-1-n-1-a-n-




Question Number 21811 by drbl.gnbd last updated on 04/Oct/17
a_1 =1, a_(n+1) =(a_n /( (√(a_n +n+1))))  Σ_(n=1) ^∞ a_n =?
$${a}_{\mathrm{1}} =\mathrm{1},\:{a}_{{n}+\mathrm{1}} =\frac{{a}_{{n}} }{\:\sqrt{{a}_{{n}} +{n}+\mathrm{1}}} \\ $$$$\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}{a}_{{n}} =? \\ $$
Commented by Ranjiy kumar last updated on 05/Oct/17
plz coment ans★
$${plz}\:{coment}\:{ans}\bigstar \\ $$

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