[tex=9.786x1.357]n8HMfO6Mg92qMEFNtRdJp1wGo++vJfNITofPcknQ2DE=[/tex]
举一反三
- 设n阶方阵A满足[tex=2.714x1.214]Ii7rpTBIBY9OnoDCpl0kqg==[/tex],证明[tex=9.786x1.357]GH5L0kUmpGoEjzqFEb68KQ==[/tex]
- 若某人群某疾病发生的阳性数X服从二项分布,则从该人群随机抽出n个人,阳性数X不少于k人的概率为 未知类型:{'options': ['[tex=11.143x1.357]Difdcc/L7Vt56d0NaE7i+3oteUxcHAW76Yzq93hLp/s=[/tex]', '[tex=12.429x1.357]+/hWzvikdWgYVdv2B5t7Q38X3kzARGe39FCO21VpivU=[/tex]', '[tex=9.786x1.357]m1uFWoeq2hP8RRaT9x7JNDFFSN3keLt2TRCKMWqob9k=[/tex]', '[tex=11.071x1.357]m1uFWoeq2hP8RRaT9x7JNMHbd6CSopCv2LfZE57PmwA=[/tex]', '[tex=9.786x1.357]pLaKge4kucpf4F0DPpPjrD9aKYcbVp65gwuuZwdTeuI=[/tex]'], 'type': 102}
- 已知[tex=9.786x1.357]X+B4/DETiyTANdqJ6QHz/8ml1m1vZqM3S9/DWVbTRsmydpv6zXYtTmH+Qd2fJrQz[/tex],试求:(1)[tex=3.214x1.357]MqtL7woeR+qgu+70wXALUq3tAyYcABseoz5Nztl37OQfyHPkvu450gfOIK3FDTVV[/tex](2)[tex=8.643x1.5]kZt34G1gy0D1tWYo0EN8DntPg2WqItPETJ8vOvGdIKuFf2p1n9qmibB/uplG/K+p[/tex](3)[tex=9.5x1.5]KI7kGzFyo7pcv4RjKJwUxaJ5BWOL+X/0lQnH6q3EjCECJnNz9nrzWW5ZHBsEnkDr[/tex].
- 设 [tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex] 阶方阵 [tex=0.786x1.0]b4HkKtHXeHofHX/gJc8Agg==[/tex] 满足 [tex=2.714x1.214]+ZPJntj7xYfllBYE3zVGBw==[/tex],证明(1)[tex=0.786x1.0]b4HkKtHXeHofHX/gJc8Agg==[/tex] 可逆;(2)[tex=9.786x1.357]06AJfdzBDu7SdZ9anbGLIPmuCvp8KJZXpIhBloDxMHk=[/tex] .
- 设 [tex=9.786x1.357]DmLEtxaAGiYDu+048gV/xQ3T6WdB+HBOrYamskuXjC5hZlBaGC/8tSWqsS1r27JZmxgNaln/RkLBcW7fN0aaGA==[/tex](1) 证明 [tex=0.786x1.0]AOSTmhvIsOwsdZlGoks7dg==[/tex]是有理数域 [tex=0.929x1.214]ipY8J/5IDyDdvaflKWkPEg==[/tex]的子环;(2) 求 [tex=0.786x1.0]AOSTmhvIsOwsdZlGoks7dg==[/tex]的单位群.