• 2022-07-26
    设向量[tex=11.286x1.357]4/I+qnOPn9SyhfCyc+zyNZf9JVVATavAzRRkH5ZAZ8kGLuudlY5PaCzT0i/Un7Pq[/tex]问[tex=0.5x0.786]gdMkE6SnyZedYLxpUxdkaQ==[/tex]为何值时[tex=2.429x1.643]9DwQYU+csHu9sJNgvoJblGoadbSFpU5woTVo2IsUTiI=[/tex]最小?并求此最小值?
  • 由于[tex=12.643x2.714]EpUzpwBFfAxqICUyUnWKH8utQR4AOCf+BxcXIE8SyIuxqt78jvBuINi1GirINYFXhFK4oEo/Gq59DiD6vsjLZJlyuv4e42wd6qohYr+CsLnq/ww3oB8ffWlGaTahCFOLuIYK8yboGlTk0l5GDOmgz7/7BxeA3S3Ev7b16GT0kdoDclxjqH+in7q/inARCuwfGw4WApicJp7f7BdFIesQgA==[/tex],设[tex=6.786x2.643]BtQDmbK3Jh18a4l5KctH4bOMsK5OWIwNBzoCz5M5sMf6dFrm5+jP9SEG4/eVQ5HE[/tex],则[tex=8.071x2.929]0Ieahr9LG5Hsre5fZkH+anRuSmCWlilYuGJkvkWUppWNoSOs5PM9czkgBDKIwFzjcteM1ch5brmfu6pevjtaHhoZqza5TQVdUcPz5eznxCE=[/tex],令[tex=3.357x1.429]0TH6kDxowa4QuxLyIWWzkw==[/tex],得[tex=2.857x1.214]Z3qnnuJlR7xxrXnKtOKC9w==[/tex]此时[tex=4.357x2.643]Uwpb1P6yJCB4K7L38dl0SNkn5Wy5kVy6oiHc4PlOoVs=[/tex].且[tex=3.143x1.143]2P6BEOfrndso/6tt6R8u0g==[/tex]时,[tex=7.429x1.429]a8hmfDlt5+6Miqni0w2pME7QTID3OBEurj7jTq1AnkI=[/tex]时,[tex=6.929x1.429]rksOKylYnMdHFZ6W50IitGsn9sBtl7P32FWXfSy70B4=[/tex]是[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex]的极大值点,也是最大值点.此时[tex=3.857x1.357]VTFb/dzBx2AfF0L03EFLzDQbNsdHMdqd/O+FegCBTZQ=[/tex]取得最大值[tex=1.643x2.643]INjCaN02FWqe+2YBzkiAXLkwQar6oReSNMZbLAzbAQo=[/tex],[tex=2.429x1.357]WbWa5x+3fxLAM34jekLMnA==[/tex]最小,最小值为[tex=0.857x2.143]QuqdXNVqR1HpaTMNiCIPtw==[/tex].

    内容

    • 0

      运行以下程序输出的结果是:( )。i=10while i>;=6:i=i-1if i%4==0:continueelse:print(i,end=' ') A: 10 9 8 7 6 B: 9 8 7 6 5 C: 10 9 7 6 D: 9 7 6 5

    • 1

      设 [tex=19.071x1.357]9iT23czbHhQCES+iSNK3EWjNyDqC+/sEar1vc88p9dr2wcSf7sMmOepiRO4q42/qgGhedcwB9YuHA56cMEAIyw==[/tex], 求[tex=0.5x0.786]gdMkE6SnyZedYLxpUxdkaQ==[/tex].

    • 2

        设 9 阶无向图 [tex=0.786x1.0]LyvDGollVJ+xwurtsLcn0g==[/tex] 中,每个顶点的度数不是 5 就是 6, 证明 : [tex=0.786x1.0]LyvDGollVJ+xwurtsLcn0g==[/tex] 中至少有 5 个 6 度顶点或至 少有 6 个5 度顶点.

    • 3

      set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}

    • 4

      >>>x= [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9]>>>print(x.sort()) 语句运行结果正确的是( )。 A: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] B: [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9] C: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0] D: ['2', '4', '0', '6', '10', '7', '8', '3', '9', '1', '5']