已知集合A={x丨x²+ax+12b=0}和B={x丨x²-ax+b=0}满足(CRA)∩B={2},A∩(CRB)={4}求实数a,b我算到a=8/7,b=-12/7对吗?我感觉把这答案代进去不满足后面那个条件不对唉
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/27 05:18:23
![已知集合A={x丨x²+ax+12b=0}和B={x丨x²-ax+b=0}满足(CRA)∩B={2},A∩(CRB)={4}求实数a,b我算到a=8/7,b=-12/7对吗?我感觉把这答案代进去不满足后面那个条件不对唉](/uploads/image/z/2572973-53-3.jpg?t=%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88A%3D%EF%BD%9Bx%E4%B8%A8x%26%23178%3B%2Bax%2B12b%3D0%EF%BD%9D%E5%92%8CB%3D%EF%BD%9Bx%E4%B8%A8x%26%23178%3B-ax%2Bb%3D0%EF%BD%9D%E6%BB%A1%E8%B6%B3%28CRA%29%E2%88%A9B%3D%7B2%7D%2CA%E2%88%A9%28CRB%29%3D%7B4%7D%E6%B1%82%E5%AE%9E%E6%95%B0a%2Cb%E6%88%91%E7%AE%97%E5%88%B0a%3D8%2F7%2Cb%3D-12%2F7%E5%AF%B9%E5%90%97%3F%E6%88%91%E6%84%9F%E8%A7%89%E6%8A%8A%E8%BF%99%E7%AD%94%E6%A1%88%E4%BB%A3%E8%BF%9B%E5%8E%BB%E4%B8%8D%E6%BB%A1%E8%B6%B3%E5%90%8E%E9%9D%A2%E9%82%A3%E4%B8%AA%E6%9D%A1%E4%BB%B6%E4%B8%8D%E5%AF%B9%E5%94%89)
x){}K_n{:OvPS64N64J5xwI=NhҺ@i_l۬cmQ#qҴ6}yϦnHIz1O;6$Z$?]@g-_,|bk<[dg?dG/Ī^]i]d6Ȉ)6IE+~pCj_gs>9ٌ@xd~qAb(( 6
已知集合A={x丨x²+ax+12b=0}和B={x丨x²-ax+b=0}满足(CRA)∩B={2},A∩(CRB)={4}求实数a,b我算到a=8/7,b=-12/7对吗?我感觉把这答案代进去不满足后面那个条件不对唉
已知集合A={x丨x²+ax+12b=0}和B={x丨x²-ax+b=0}满足(CRA)∩B={2},A∩(CRB)={4}求实数a,b
我算到a=8/7,b=-12/7对吗?我感觉把这答案代进去不满足后面那个条件不对唉
已知集合A={x丨x²+ax+12b=0}和B={x丨x²-ax+b=0}满足(CRA)∩B={2},A∩(CRB)={4}求实数a,b我算到a=8/7,b=-12/7对吗?我感觉把这答案代进去不满足后面那个条件不对唉
······我算出来也是这么多