2.4随机变量及其分布-高中数学培优必练（逻辑、概率、复数、选学）

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` ' $ (" *- " . P 0 " ': ' - A . ( #: ' - ( ) : ' . ( #"!(/)"!./#"!3 " TU + _` ' ( (" a` - " . 4P 1V " ': ' -. ( #: ' - (, : ' . ( # ' $%"!$/ ( 8"!3"# "!/$ " T U + _ ` ' . (" H 2 C O # b X @ O * 8 6)$ # - 6 $< ' . # ( $<%6 $ ' ( # 6 #- 6 $< # 3% /6 3 ' " % 6 % $< " 6 ) , (" 8 6)$ c* (KX " ! /6 3 dD*e? " ! 6 2 3 #e?3 " a' 6#" " 3 " $( " $< " + & ,? " 92COIE( & ,(KX " TU ! 6 f =! ! %& " !"-@#!G*1A$($HD*+ ! IG+, 1A$($JD*+ ! KL+4<$MN " (/F)" ! "! ! ! '% " /$&' ! ! () " g 4F. G3S : ' - (" a"%# 1 V Z 3 S : ' -. (" h\ai%.'3S : ' . + - ( # : ' -. ( : ' - ( " HIJK 3S78 ! ! $!