If

A=1+1/[1+2]+1/[1+2+3]+.....+1/[1+2+3+....1000]

and
B=1+[3/4]+[9/(16×2!)]+[27/(64×3!)]+...+[3⁹⁹/(4⁹⁹×99!)]+...if the value of "B" converges.

How do i find [A²+B²]?

2 answers

A = 2000/1001
B ≈ 2.117

But how sir obleck?

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