求下列函数中自变量X的取值范围y=4x^2+3x-5求下列函数中自变量X的取值范围1.y =4x^2+3x-52.y =(1+2x) / 1+x-6x^23.y = √5+3x4.y =1 / √2x-1
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![求下列函数中自变量X的取值范围y=4x^2+3x-5求下列函数中自变量X的取值范围1.y =4x^2+3x-52.y =(1+2x) / 1+x-6x^23.y = √5+3x4.y =1 / √2x-1](/uploads/image/z/10148611-67-1.jpg?t=%E6%B1%82%E4%B8%8B%E5%88%97%E5%87%BD%E6%95%B0%E4%B8%AD%E8%87%AA%E5%8F%98%E9%87%8FX%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4y%3D4x%5E2%2B3x-5%E6%B1%82%E4%B8%8B%E5%88%97%E5%87%BD%E6%95%B0%E4%B8%AD%E8%87%AA%E5%8F%98%E9%87%8FX%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B41.y+%3D4x%5E2%2B3x-52.y+%3D%281%2B2x%29+%2F+1%2Bx-6x%5E23.y+%3D+%E2%88%9A5%2B3x4.y+%3D1+%2F+%E2%88%9A2x-1)
求下列函数中自变量X的取值范围y=4x^2+3x-5求下列函数中自变量X的取值范围1.y =4x^2+3x-52.y =(1+2x) / 1+x-6x^23.y = √5+3x4.y =1 / √2x-1
求下列函数中自变量X的取值范围y=4x^2+3x-5
求下列函数中自变量X的取值范围
1.y =4x^2+3x-5
2.y =(1+2x) / 1+x-6x^2
3.y = √5+3x
4.y =1 / √2x-1
求下列函数中自变量X的取值范围y=4x^2+3x-5求下列函数中自变量X的取值范围1.y =4x^2+3x-52.y =(1+2x) / 1+x-6x^23.y = √5+3x4.y =1 / √2x-1
1.y =4x^2+3x-5
判别式>0 x实数
2.y =(1+2x) / 1+x-6x^2
1+x-6x^2≠0 x≠-1/3 x≠1/2
3.y = √(5+3x)
x>= -5/3
4.y =1 / √(2x-1)
x>=1/2
y=2x-5;y=2/x-3 如题``急要` y=2x-5 x可以取任意实数 y=2/(x-3) 分母不等于0所以x-3≠0 x≠3 y=2x-5 x取全体实数 y=2/
1. X属于R;
2.因为是分式,所以要求分母不等于0,即:
1+x-6x^2≠0
所以 x≠-1/3 且 x≠1/2
3.因为是根式,要求被开方数大于等0,即:
5+3x>=0
所以 x>=-5/3
4.又...
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1. X属于R;
2.因为是分式,所以要求分母不等于0,即:
1+x-6x^2≠0
所以 x≠-1/3 且 x≠1/2
3.因为是根式,要求被开方数大于等0,即:
5+3x>=0
所以 x>=-5/3
4.又是根式,又是分式,要求被开方数大于等0且分母不等0,即:
2x-1>=0且2x-1≠0
所以 x>1/2
收起
1.任何数
2. (1+x-6x^2)不等于0,X不等于1/2和-1/3
3.(5+3x)大于等于0,X大于等于-5/3
4. (2x-1)大于等于0且 √2x-1不等于0,即(2x-1)大于0,X大于1/2