设随机变量X的概率密度为[img=141x58]1802fe2341f2d49.png[/img]则Y = 2X的概率密度为( ).
A: [img=94x57]1802fe234a8c0fc.png[/img]
B: [img=98x60]1802fe23533d6ad.png[/img]
C: [img=90x57]1802fe235c1e6dc.png[/img]
D: [img=85x56]1802fe2364ad730.png[/img]
A: [img=94x57]1802fe234a8c0fc.png[/img]
B: [img=98x60]1802fe23533d6ad.png[/img]
C: [img=90x57]1802fe235c1e6dc.png[/img]
D: [img=85x56]1802fe2364ad730.png[/img]
举一反三
- 设随机变量X的概率密度为[img=141x58]18031e918ac0a31.png[/img]则Y=2X的概率密度为( ). A: [img=94x57]18031e9193e38c9.png[/img] B: [img=98x60]18031e919c15015.png[/img] C: [img=90x57]18031e91a43b082.png[/img] D: [img=85x56]18031e91ae26fb4.png[/img]
- 设随机变量X的概率密度为[img=141x58]1802f2ac31c3b60.png[/img]则Y=2X的概率密度为( ). A: [img=94x57]1802f2ac42aa11b.png[/img] B: [img=98x60]1802f2ac4b393eb.png[/img] C: [img=90x57]1802f2ac563d0dc.png[/img] D: [img=85x56]1802f2ac5f4edc8.png[/img]
- 设随机变量X的概率密度为[img=141x58]1802f2c25d71169.png[/img]则Y=2X的概率密度为( ). A: [img=94x57]1802f2c2662696f.png[/img] B: [img=98x60]1802f2c26f09c97.png[/img] C: [img=90x57]1802f2c277cb0dd.png[/img] D: [img=85x56]1802f2c27fffae2.png[/img]
- 设随机变量X的概率密度为[img=141x58]1802fe31adbd97f.png[/img]则Y=2X的概率密度为( ). A: [img=94x57]1802fe31b66ec7a.png[/img] B: [img=98x60]1802fe31be98277.png[/img] C: [img=90x57]1802fe31c676a17.png[/img] D: [img=85x56]1802fe31cedadaf.png[/img]
- 设随机变量X的概率密度为[img=141x58]1802f2a7275e23a.png[/img]则Y=2X的概率密度为( ). A: [img=94x57]1802f2a72f3abea.png[/img] B: [img=98x60]1802f2a737bee85.png[/img] C: [img=90x57]1802f2a73f72a06.png[/img] D: [img=85x56]1802f2a747e2c63.png[/img]