[中學] 極限
1 2 3 n
若a_n = _________ + __________ + ___________ + .... + ________
√(4n^2+1) √(4n^2+2) √(4n^2+3) √(4n^2+ n)
a_n
則 lim _______ = ?
n→∞ 5n
麻煩了~~
thx!
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