x^3+3x+2的判别式的值?() A: -108 B: -216 C: 108 D: 216
x^3+3x+2的判别式的值?() A: -108 B: -216 C: 108 D: 216
下列函数中连续函数有 . A: [img=216x61]18033a2159139cd.png[/img] B: [img=216x61]18033a2163f6530.png[/img] C: [img=216x61]18033a216f0d8fc.png[/img] D: [img=204x61]18033a217a340b3.png[/img]
下列函数中连续函数有 . A: [img=216x61]18033a2159139cd.png[/img] B: [img=216x61]18033a2163f6530.png[/img] C: [img=216x61]18033a216f0d8fc.png[/img] D: [img=204x61]18033a217a340b3.png[/img]
常用钢丝绳一般为6 X 19、6 X 37、6 X 61三种。()
常用钢丝绳一般为6 X 19、6 X 37、6 X 61三种。()
独立重复地投掷一颗均匀的骰子,直到出现6点就停止投掷,设X表示投掷骰子的次数,则X的分布列是______________. A: X123456P1/61/61/61/61/61/6 B: X123456…P1/61/61/61/61/61/6… C: X123…k…P[img=9x43]1803da13460ecf5.png[/img][img=36x43]1803da134eadb99.png[/img][img=57x43]1803da135709664.png[/img]…[img=58x43]1803da135e5a076.png[/img]… D: X123…k…P[img=9x43]1803da13671cd55.png[/img][img=36x43]1803da13703c21c.png[/img][img=57x43]1803da1378489ec.png[/img]…[img=58x43]1803da13822269c.png[/img]…
独立重复地投掷一颗均匀的骰子,直到出现6点就停止投掷,设X表示投掷骰子的次数,则X的分布列是______________. A: X123456P1/61/61/61/61/61/6 B: X123456…P1/61/61/61/61/61/6… C: X123…k…P[img=9x43]1803da13460ecf5.png[/img][img=36x43]1803da134eadb99.png[/img][img=57x43]1803da135709664.png[/img]…[img=58x43]1803da135e5a076.png[/img]… D: X123…k…P[img=9x43]1803da13671cd55.png[/img][img=36x43]1803da13703c21c.png[/img][img=57x43]1803da1378489ec.png[/img]…[img=58x43]1803da13822269c.png[/img]…
独立重复地投掷一颗均匀的骰子,直到出现6点就停止投掷,设X表示投掷骰子的次数,则X的分布列是______________. A: X123456P1/61/61/61/61/61/6 B: X123456…P1/61/61/61/61/61/6… C: X123…k…P[img=9x43]1803573572a7b80.png[/img][img=36x43]180357357af3976.png[/img][img=57x43]180357358399321.png[/img]…[img=58x43]180357358bf0f84.png[/img]… D: X123…k…P[img=9x43]180357359488348.png[/img][img=36x43]180357359c7d68a.png[/img][img=57x43]18035735a57969a.png[/img]…[img=58x43]18035735ae0e3f4.png[/img]…
独立重复地投掷一颗均匀的骰子,直到出现6点就停止投掷,设X表示投掷骰子的次数,则X的分布列是______________. A: X123456P1/61/61/61/61/61/6 B: X123456…P1/61/61/61/61/61/6… C: X123…k…P[img=9x43]1803573572a7b80.png[/img][img=36x43]180357357af3976.png[/img][img=57x43]180357358399321.png[/img]…[img=58x43]180357358bf0f84.png[/img]… D: X123…k…P[img=9x43]180357359488348.png[/img][img=36x43]180357359c7d68a.png[/img][img=57x43]18035735a57969a.png[/img]…[img=58x43]18035735ae0e3f4.png[/img]…
独立重复地投掷一颗均匀的骰子,直到出现6点就停止投掷,设X表示投掷骰子的次数,则X的分布列是______________. A: X123456P1/61/61/61/61/61/6 B: X123456…P1/61/61/61/61/61/6… C: X123…k…P[img=9x43]1803da175d21bb3.png[/img][img=36x43]1803da176510759.png[/img][img=57x43]1803da176e34ee6.png[/img]…[img=58x43]1803da177747ce7.png[/img]… D: X123…k…P[img=9x43]1803da177fbaa74.png[/img][img=36x43]1803da17890c39f.png[/img][img=57x43]1803da1792a9c56.png[/img]…[img=58x43]1803da179bd7a28.png[/img]…
独立重复地投掷一颗均匀的骰子,直到出现6点就停止投掷,设X表示投掷骰子的次数,则X的分布列是______________. A: X123456P1/61/61/61/61/61/6 B: X123456…P1/61/61/61/61/61/6… C: X123…k…P[img=9x43]1803da175d21bb3.png[/img][img=36x43]1803da176510759.png[/img][img=57x43]1803da176e34ee6.png[/img]…[img=58x43]1803da177747ce7.png[/img]… D: X123…k…P[img=9x43]1803da177fbaa74.png[/img][img=36x43]1803da17890c39f.png[/img][img=57x43]1803da1792a9c56.png[/img]…[img=58x43]1803da179bd7a28.png[/img]…
设二维随机变量(X,Y)的联合密度函数为[img=216x61]1803da284802498.png[/img],则P{X<1}=( ) A: 1/e B: 2/e C: 1-1/e D: 1-2/e
设二维随机变量(X,Y)的联合密度函数为[img=216x61]1803da284802498.png[/img],则P{X<1}=( ) A: 1/e B: 2/e C: 1-1/e D: 1-2/e
设二维随机变量(X,Y)的联合密度函数为[img=216x61]180338109ab77a2.png[/img],则P{X<1}=( ) A: 1/e B: 2/e C: 1-1/e D: 1-2/e
设二维随机变量(X,Y)的联合密度函数为[img=216x61]180338109ab77a2.png[/img],则P{X<1}=( ) A: 1/e B: 2/e C: 1-1/e D: 1-2/e
设二维随机变量(X,Y)的联合密度函数为[img=216x61]1803279082c776d.png[/img],则P{X<1}=( ) A: 1/e B: 2/e C: 1-1/e D: 1-2/e
设二维随机变量(X,Y)的联合密度函数为[img=216x61]1803279082c776d.png[/img],则P{X<1}=( ) A: 1/e B: 2/e C: 1-1/e D: 1-2/e
设二维随机变量(X,Y)的联合密度函数为[img=216x61]1803da2937f6ef4.png[/img],则P{X<1}=( ) A: 1/e B: 2/e C: 1-1/e D: 1-2/e
设二维随机变量(X,Y)的联合密度函数为[img=216x61]1803da2937f6ef4.png[/img],则P{X<1}=( ) A: 1/e B: 2/e C: 1-1/e D: 1-2/e