1 设集合A={X||X-2|≤2,X∈R},B={y|y=-x^2,-1≤X≤2}则CR(A∩B)等于【 】A.R B.{X∈R,X≠0} C.{0} D.空集2 若函数y=f(x)的反函数是y=g(x),f(a)=b,ab≠0,则g(b)=【 】A.a B.a^-1 C.b D.b^-13
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![1 设集合A={X||X-2|≤2,X∈R},B={y|y=-x^2,-1≤X≤2}则CR(A∩B)等于【 】A.R B.{X∈R,X≠0} C.{0} D.空集2 若函数y=f(x)的反函数是y=g(x),f(a)=b,ab≠0,则g(b)=【 】A.a B.a^-1 C.b D.b^-13](/uploads/image/z/6040758-30-8.jpg?t=1+%E8%AE%BE%E9%9B%86%E5%90%88A%EF%BC%9D%EF%BD%9BX%7C%7CX%EF%BC%8D2%7C%E2%89%A42%2CX%E2%88%88R%EF%BD%9D%2CB%EF%BC%9D%EF%BD%9By%7Cy%EF%BC%9D%EF%BC%8Dx%5E2%2C%EF%BC%8D1%E2%89%A4X%E2%89%A42%EF%BD%9D%E5%88%99CR%EF%BC%88A%E2%88%A9B%EF%BC%89%E7%AD%89%E4%BA%8E%E3%80%90+%E3%80%91A.R+B.%EF%BD%9BX%E2%88%88R%2CX%E2%89%A00%EF%BD%9D+C.%EF%BD%9B0%EF%BD%9D+D.%E7%A9%BA%E9%9B%862+%E8%8B%A5%E5%87%BD%E6%95%B0y%EF%BC%9Df%28x%29%E7%9A%84%E5%8F%8D%E5%87%BD%E6%95%B0%E6%98%AFy%EF%BC%9Dg%28x%29%2Cf%28a%29%EF%BC%9Db%2Cab%E2%89%A00%2C%E5%88%99g%28b%29%EF%BC%9D%E3%80%90+%E3%80%91A.a+B.a%5E%EF%BC%8D1+C.b+D.b%5E%EF%BC%8D13)
1 设集合A={X||X-2|≤2,X∈R},B={y|y=-x^2,-1≤X≤2}则CR(A∩B)等于【 】A.R B.{X∈R,X≠0} C.{0} D.空集2 若函数y=f(x)的反函数是y=g(x),f(a)=b,ab≠0,则g(b)=【 】A.a B.a^-1 C.b D.b^-13
1 设集合A={X||X-2|≤2,X∈R},B={y|y=-x^2,-1≤X≤2}则CR(A∩B)等于【 】
A.R B.{X∈R,X≠0} C.{0} D.空集
2 若函数y=f(x)的反函数是y=g(x),f(a)=b,ab≠0,则g(b)=【 】
A.a B.a^-1 C.b D.b^-1
3 已知f(x)=1/2x^2-2X+3,若f(x)在【0,m】上的最大值为3,最小值为1,求m的取值范围
1 设集合A={X||X-2|≤2,X∈R},B={y|y=-x^2,-1≤X≤2}则CR(A∩B)等于【 】A.R B.{X∈R,X≠0} C.{0} D.空集2 若函数y=f(x)的反函数是y=g(x),f(a)=b,ab≠0,则g(b)=【 】A.a B.a^-1 C.b D.b^-13
1.解A:-2≤x-2≤2,0≤x≤4
B:-4≤x≤0
交集:x=0,选C
2.反函数定义,f(x)=y,g(y)=x,则f,g互为反函数.选A
3.对称轴:-b/2a=2,最小值=1
f(0)=3,3为最大值,所以区间[3,m]最大值在x=0时,
所以f(m)≤3,且大于等于1
所以2≤m≤4