求教这道极限(请大神求这道高数题的极限)
请大神求这道高数题的极限这道极限怎么求呢？求解这道极限题如何做？这道极限题怎么求？请大神求这道高数题的极限lim cos(/n)*lim∑i/(n^2 + i)=1*lim∑i/(n^2 +i)=lim∑i/(n^2 + i)因为：i/(n^2+n) ≤ i/(n^2 + i) ≤ i/(n^2 +1) 注：1≤ i ≤ n所以，∑i/(n^2 +n) ≤∑i/(n
请大神求这道高数题的极限这道极限怎么求呢？求解这道极限题如何做？这道极限题怎么求？请大神求这道高数题的极限lim cos(/n)*lim∑i/(n^2 + i)=1*lim∑i/(n^2 +i)=lim∑i/(n^2 + i)因为：i/(n^2+n) ≤ i/(n^2 + i) ≤ i/(n^2 +1) 注：1≤ i ≤ n所以，∑i/(n^2 +n) ≤∑i/(n