若函数fx=2x+1分之1-x的值域是具体方法!
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![若函数fx=2x+1分之1-x的值域是具体方法!](/uploads/image/z/1260998-62-8.jpg?t=%E8%8B%A5%E5%87%BD%E6%95%B0fx%3D2x%2B1%E5%88%86%E4%B9%8B1-x%E7%9A%84%E5%80%BC%E5%9F%9F%E6%98%AF%E5%85%B7%E4%BD%93%E6%96%B9%E6%B3%95%21)
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若函数fx=2x+1分之1-x的值域是具体方法!
若函数fx=2x+1分之1-x的值域是
具体方法!
若函数fx=2x+1分之1-x的值域是具体方法!
f(x)=(-x-0.5+1.5)/[2(x+0.5)]
=[-(x+0.5)+1.5]/[2(x+0.5)]
=-(x+0.5)/[2(x+0.5)]+1.5/[2(x+0.5)]
=-1/2+3/(4x+2)
3/(4x+1)≠0
所以-1/2+3/(4x+)≠-1/2
所以值域(-∞,-1/2)∪(-1/2,+∞)