设随机变量 )，记 ，则的密度函数 为。https://img-ph-mirror.nosdn.127.net/ePcHOcmdoHIDoMt9jLIn2g==/6631702183909111121.pnghttps://img-ph-mirror.nosdn.127.net/_HG7V_e5OPtONcYCrJRirQ==/6631573541048662542.pnghttps://img-
举一反三
- 设随机变量具有对称的密度函数，即，为的分布函数，则对任意实数,.https://img-ph-mirror.nosdn.127.net/lEiAQJQKvY14Qo2qj0E1Aw==/1072982611321422975.pnghttps://img-ph-mirror.nosdn.127.net/9BNVrADIkYbX410xL65RVg==/6631230493421812375.pnghttps://img-ph-mirror.nosdn.127.net/055psK1qEelFN3vSsaG0zQ==/6599288581122298726.pnghttps://img-ph-mirror.nosdn.127.net/lEiAQJQKvY14Qo2qj0E1Aw==/1072982611321422975.pnghttps://img-ph-mirror.nosdn.127.net/5ISpkzigMMeRmCo4M1UdLQ==/6608183630190574284.pnghttps://img-ph-mirror.nosdn.127.net/DDNn9dWDdvU11YRbl_vFSg==/285697101462025554.png
- 设随机变量X的分布函数 则P(X=5)=2/3.https://img-ph-mirror.nosdn.127.net/0rDVwfafl0wWg4kmf0GicQ==/6630190355419977757.png
- 设，则（为常数）的值．https://img-ph-mirror.nosdn.127.net/OCKSU6xXGRmrhqyAjxCsLQ==/6608185829214053227.pnghttps://img-ph-mirror.nosdn.127.net/JkqlqFql5XkrAZfdvWFndg==/6608888417143176694.pnghttps://img-ph-mirror.nosdn.127.net/twXY8ldkHYPX6F401pfEHA==/6597409515751723222.png
- 设函数在有界闭区域上连续，则是的https://img-ph-mirror.nosdn.127.net/AzSolBHpAcwrMwJeuCZ3qw==/6608821346933715540.pnghttps://img-ph-mirror.nosdn.127.net/7fwte4zRVRFsQA6AJGLNzQ==/6599274287471067843.pnghttps://img-ph-mirror.nosdn.127.net/JP8UrBsuml645rOhx1gFcw==/6608897213236161833.pnghttps://img-ph-mirror.nosdn.127.net/O_G3pHt3KyUzaRcmaobAmg==/6608234207725603267.png
- 设函数在点处存在关于和的一阶偏导数，则极限的值为.https://img-ph-mirror.nosdn.127.net/AzSolBHpAcwrMwJeuCZ3qw==/6608821346933715540.pnghttps://img-ph-mirror.nosdn.127.net/riflWFLWLx67TbwPlzd9tA==/6608437617375621610.pnghttps://img-ph-mirror.nosdn.127.net/dyIPWyFt4Slg58f2hJhSgA==/6599324865005947430.pnghttps://img-ph-mirror.nosdn.127.net/UdiS2LasHHPU1rvP0W8m0g==/6599309471843212852.pnghttps://img-ph-mirror.nosdn.127.net/9E39I3VJ73DxsgLGL8JhGg==/6608841138143042768.png