[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fJfJnwZy9lbvWnyuFX1MhDBYy1DXtWzGImVLonYrhYJg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2026-01-15 13:11:24",235105114,[8,9,10,11],"双射函数","不是函数","满射函数","单射函数",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},132,"b6b5c394a79af6ad8bd927814ee5e4d4","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","离散数学","work_48216541","NEW-离散数学-第五章作业","设函数f:A→B,g:B→C, 若f、g是满射,则f°g是",[21,32,41,50,59,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],235105110,[25,26,27,28],"f是满射函数,g是单射函数","f是单射函数,g是满射函数","f是满射函数,g是满射函数","f是单射函数,g是单射函数","设函数f:A→B,g:B→C,若f°g是双射,则","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],235105111,[36,37,38,39],"f:R->[-1,1],f(x)=sin2x","f:N->N,f(n)=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2815196056c8a054360d9b1c86374fd5.webp\">+2","f:R->R,f(x)=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd4756bab4bb503af2396444b82d7f3a0.webp\">+1","f:N->N,f(n)= n mod 3","下列函数中非单非满映射的是",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],235105112,[45,46,47,48],"g是满射函数","f是单射函数","f是满射函数","g是双射函数","设函数g:A→B,f:B→C, 若g°f是满射,则",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],235105113,[54,55,56,57],"9\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe3cda31aeccd3dd434ba85fd9f464854.webp\">+8","12\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F95a6281adb2d51051cbd6d2aba7dd36e.webp\">+12\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd4756bab4bb503af2396444b82d7f3a0.webp\">-9\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe3cda31aeccd3dd434ba85fd9f464854.webp\">-6x+6","18\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F49fbbb96043cd5c751c4e8493faeedea.webp\">+39\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F44de72553abd775dc59cdfbf0a9bf336.webp\">+20","6\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe3cda31aeccd3dd434ba85fd9f464854.webp\">+3x","设有函数f:R→R和g:R→R,且有f(x)=3\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F44de72553abd775dc59cdfbf0a9bf336.webp\">+3,g(x)=2\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F44de72553abd775dc59cdfbf0a9bf336.webp\">+x-1,求f(x) o g(x)=",{"answer":60,"createTime":5,"id":6,"options":61,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],235105115,[66,67,68,69],"不是单射也不是满射","单射","满射","双射","X={a,b,c,d,e},Y={1,2,3,4},f从X到Y的映射,其中f(a)=2,f(b)=4,f(c)=1,f(d)=3,f(e)=4,则f是",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],235105116,[75,76,77,78],"sin\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fff86ac6ed740babca2566fb37b5b210c.webp\">","f(x)=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0c3f351f5b03174c1d613c37946436b5.webp\">","x x>0f(x)={ x+2 x≤0","f(x)=sin x","下列函数中,实数集到实数集的双射的是",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],235105117,[84,85,86,87],"{<x,y>|x,y∈N,x+y<10}","{<x,y>|x,y∈R,x=|y|}","{<x,y>|x,y∈R,|x|=|y|}","{<x,y>|x,y∈R,|x|=y}","下列关系中能构成函数的是",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],235105118,[93,94,95,96],"f是单射","f是满射","f非单射非满射","f是双射的","设函数f:N→N(N 为自然数集),f(n)=n+1,下面四个命题为真的是",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],235105119,[102,103,104,105],"{<1,b>,<2,b>,<3,b>}","{<1,c>,<2,a>,<3,b>}","{<1,a>,<1,b>,<3,c>}","{<1,a>,<2,a>,<3,c>}","设A={1,2,3},B={a,b,c},下列关系 是从A到B的双射函数"]