3阶方阵[tex=0.786x1.286]pi/GsQ3apuRt43V3XQq/tA==[/tex]有特征值-1,1,2,它们所对应的特征向量分别为[tex=3.429x1.286]cVXfC6eSh9CalCE+rwFPbnjtbkiuTI8qZyfT9Vk1qq8=[/tex],令[tex=8.357x1.643]r9ks5uqIRuEXk9hHad1rOYI+HXF5S0y2kMq67df7mPBIBBImr5NzkerJTg4PPrZFc9YmRuTOLSJZw9OPwoJ2n/HhvS/uYY6Ws5kKmaMpS6Y=[/tex],则[tex=3.357x1.286]c0UF8VG1YfBAkdtQdtGjUA==[/tex]为( ),且说明理由。(A)[tex=6.5x3.643]De166nmeTkb4C/83+ZZH2+njLl4n4EmkBOYUGCuusBerRCLXOkBPMKktGH1vHQ4sZy96FlOILTqWZEViffHUqQysDEfwDjxH49Ke79Q5aHIS6GsY4yD5MBSuGTSdihz6[/tex](B)[tex=6.5x3.643]De166nmeTkb4C/83+ZZH23fToKp6pMOeEMSDLAS3NwAjLXc+Ng1jPT9XoO5qSb/77fIEtpWU3tOlJSJJ6zuB+1aqnlMDAiwWA6K4UfxY3wc7/3csLsxbWVbPO8L96Wc/[/tex](C)[tex=6.5x3.643]De166nmeTkb4C/83+ZZH23fToKp6pMOeEMSDLAS3NwDRggNQPKt3IBETLp7rqxW2ohIPf4pJayjwmT+W/GwTeV9TlI72ESejwgpzdyWs02HGu0UPF789MeWLj00kELjg[/tex](D)[tex=6.5x3.643]De166nmeTkb4C/83+ZZH2//CL48ZcHewuj6kjMlucwe4cA5RiaM3IB9DIESqhubajJbmv0IUC29p7q4yKiSN5cYVDpLV0gcLn32dD6wMJxWDHZQiVhOtKhfxnQj+9v0g[/tex]
3阶方阵[tex=0.786x1.286]pi/GsQ3apuRt43V3XQq/tA==[/tex]有特征值-1,1,2,它们所对应的特征向量分别为[tex=3.429x1.286]cVXfC6eSh9CalCE+rwFPbnjtbkiuTI8qZyfT9Vk1qq8=[/tex],令[tex=8.357x1.643]r9ks5uqIRuEXk9hHad1rOYI+HXF5S0y2kMq67df7mPBIBBImr5NzkerJTg4PPrZFc9YmRuTOLSJZw9OPwoJ2n/HhvS/uYY6Ws5kKmaMpS6Y=[/tex],则[tex=3.357x1.286]c0UF8VG1YfBAkdtQdtGjUA==[/tex]为( ),且说明理由。(A)[tex=6.5x3.643]De166nmeTkb4C/83+ZZH2+njLl4n4EmkBOYUGCuusBerRCLXOkBPMKktGH1vHQ4sZy96FlOILTqWZEViffHUqQysDEfwDjxH49Ke79Q5aHIS6GsY4yD5MBSuGTSdihz6[/tex](B)[tex=6.5x3.643]De166nmeTkb4C/83+ZZH23fToKp6pMOeEMSDLAS3NwAjLXc+Ng1jPT9XoO5qSb/77fIEtpWU3tOlJSJJ6zuB+1aqnlMDAiwWA6K4UfxY3wc7/3csLsxbWVbPO8L96Wc/[/tex](C)[tex=6.5x3.643]De166nmeTkb4C/83+ZZH23fToKp6pMOeEMSDLAS3NwDRggNQPKt3IBETLp7rqxW2ohIPf4pJayjwmT+W/GwTeV9TlI72ESejwgpzdyWs02HGu0UPF789MeWLj00kELjg[/tex](D)[tex=6.5x3.643]De166nmeTkb4C/83+ZZH2//CL48ZcHewuj6kjMlucwe4cA5RiaM3IB9DIESqhubajJbmv0IUC29p7q4yKiSN5cYVDpLV0gcLn32dD6wMJxWDHZQiVhOtKhfxnQj+9v0g[/tex]
x>0,函数y=x+9/x的最小值是: A: 6 B: 5 C: 7 D: 6.5
x>0,函数y=x+9/x的最小值是: A: 6 B: 5 C: 7 D: 6.5
用初等变换法求下列矩阵的逆矩阵:[tex=6.5x3.643]dEdrC9SQsN/3Vx39SaFo4GvXklf97FoC6t34nbv7+LgIfE2qkUvTNVj1/6h+8UAOEy/Q4O+NnPmFmob/4SAdqtwB7fdWRofzFanu1qVfP3jGQXj3QcUIm8BTbyy6xBsE[/tex];
用初等变换法求下列矩阵的逆矩阵:[tex=6.5x3.643]dEdrC9SQsN/3Vx39SaFo4GvXklf97FoC6t34nbv7+LgIfE2qkUvTNVj1/6h+8UAOEy/Q4O+NnPmFmob/4SAdqtwB7fdWRofzFanu1qVfP3jGQXj3QcUIm8BTbyy6xBsE[/tex];
假设 X~U(3, 13) ,利用 matlab 计算 E(X)和 D(X)的结果是 A: 6, 5.3333 B: 7.5, 6.7500 C: 8, 8.3333 D: 6.5, 4.0833
假设 X~U(3, 13) ,利用 matlab 计算 E(X)和 D(X)的结果是 A: 6, 5.3333 B: 7.5, 6.7500 C: 8, 8.3333 D: 6.5, 4.0833
利用矩阵的初等行变换将矩阵 [tex=6.5x3.643]NeoTBlf1CmkUoMf07Si5dAD8ZbdksGO0fA9hs2XXNUaQJ6hik+QdSdzXXL7Do2ZtpnsSmK0ZLOe+TqTc8cQQL0vYoBA6XmfXeaLwdFf/3Cv4X/cEuPU+mDvs22bLGJ6N[/tex] 化为行最简矩阵.
利用矩阵的初等行变换将矩阵 [tex=6.5x3.643]NeoTBlf1CmkUoMf07Si5dAD8ZbdksGO0fA9hs2XXNUaQJ6hik+QdSdzXXL7Do2ZtpnsSmK0ZLOe+TqTc8cQQL0vYoBA6XmfXeaLwdFf/3Cv4X/cEuPU+mDvs22bLGJ6N[/tex] 化为行最简矩阵.
x>0, 函数 y=x+9/x 的最小值是: A: 6 B: 5 C: 7 D: 6.5
x>0, 函数 y=x+9/x 的最小值是: A: 6 B: 5 C: 7 D: 6.5
我国对骨质疏松BMD检测(),诊断(),治疗率() A: 20%,35%,6.5% B: 20%,36%,6.5% C: 23%,35%,6.5% D: 23%,36%,6.5%
我国对骨质疏松BMD检测(),诊断(),治疗率() A: 20%,35%,6.5% B: 20%,36%,6.5% C: 23%,35%,6.5% D: 23%,36%,6.5%
25℃时,纯水的pH为6.5,则其pOH应为() A: 7.5 B: 6.5 C: 7 D: 小于6.5
25℃时,纯水的pH为6.5,则其pOH应为() A: 7.5 B: 6.5 C: 7 D: 小于6.5
某温度下,纯水的pH为6.5,则其pOH为( )。 A: 7 B: 7.5 C: 6.5 D: 大于6.5
某温度下,纯水的pH为6.5,则其pOH为( )。 A: 7 B: 7.5 C: 6.5 D: 大于6.5
某温度时,纯水的pH为6.5,则其pOH应为 A: 7.5 B: 6.5 C: 7 D: 小于6.5
某温度时,纯水的pH为6.5,则其pOH应为 A: 7.5 B: 6.5 C: 7 D: 小于6.5