-size: 12pt; line-height: 150%">N</span><span style="font-size: 12pt; line-height: 150%">，</span><span style="font-size: 12pt; line-height: 150%">N</span><span style="font-size: 12pt; line-height: 150%">的含义如题目所述。</span></div>
<div style="line-height: 150%"><span style="font-size: 12pt; line-height: 150%">&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 12pt; line-height: 150%">接下来有</span><span style="font-size: 12pt; line-height: 150%">N-2</span><span style="font-size: 12