• 2022-06-06
    中国大学MOOC: http://edu-image.nosdn.127.net/581311BC4F5E866B4534FB8A2CB01F10.png?imageView&thumbnail=890x0&quality=100如果矩阵X满足AXB=C,则X是(  )
  • http://edu-image.nosdn.127.net/_PhotoUploadUtils_b0860f52-bbc5-4121-a494-4d3c05ecd756.png

    内容

    • 0

      中国大学MOOC: 下图中,若http://edu-image.nosdn.127.net/3CC508F9AB3640FC7B4FC8A56BCC3C4A.png?imageView&thumbnail=890x0&quality=100,http://edu-image.nosdn.127.net/1E98E4093ED9A9CF99D5410CB4F9E5FC.png?imageView&thumbnail=890x0&quality=1000011,求http://edu-image.nosdn.127.net/C431073D6B6C788B674E11D5E7EA9B8F.png?imageView&thumbnail=890x0&quality=100( )。http://edu-image.nosdn.127.net/3F2606B33B97941F5DFADC9F32BD58AD.png?imageView&thumbnail=890x0&quality=100

    • 1

      中国大学MOOC: 下列取代羧酸中酸性最强的是()。http://edu-image.nosdn.127.net/7C237BDF245EC393A5506C4874523609.png?imageView&thumbnail=890x0&quality=100、http://edu-image.nosdn.127.net/EFA954264582A372C3C9085E40BE80E9.png?imageView&thumbnail=890x0&quality=100、http://edu-image.nosdn.127.net/926CD4F17B92218A7FF5D06D34C5CAAF.png?imageView&thumbnail=890x0&quality=100、http://edu-image.nosdn.127.net/6504083F25D32BC8A95C11AC770935E2.png?imageView&thumbnail=890x0&quality=100

    • 2

      设f(x)是反比例函数,且f(-2)=4,则() A: f(x)=4/x B: f(x)=-4/x C: f(x)=8/x D: f(x)=-8/x

    • 3

      青书学堂: 二次型 f( x 1 , x 2 , x 3 )=2 x 1 2 +5 x 2 2 +5 x 3 2 +4 x 1 x 2 −8 x 2 x 3 ,则 f的矩阵为 。

    • 4

      中国大学MOOC: 在图中,BC段内( )。http://edu-image.nosdn.127.net/0ACCF945AAB395819D2F1B06DCF6EE62.png?imageView&thumbnail=890x0&quality=100