4x+2-5x-1=1
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4x+2-5x-1=14x+2-5x-1=14x+2-5x-1=14x+2-5x-1=14x-5x=1+1-2-x=0x=04x-5x=-2+1+1-1x=0x=04x+2-5x-1=11-X=1x=
4x+2-5x-1=1
4x+2-5x-1=1
4x+2-5x-1=1
4x+2-5x-1=1
4x-5x=1+1-2
-x=0
x=0
4x-5x=-2+1+1
-1x=0
x=0
4x+2-5x-1=1
1-X=1
x=1-1
x=0
4x-5x=1-2+1
-x=0
x=0
x+2/x+1=5/x-1/x(x+1) 求化简!
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
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(1) √3_____{x|x≤2},(1,2)____{(x,y)|(1) √3_____{x|x≤2},(1,2)____{(x,y)|y=x+1}(2) √2+√5_____{x|x≤2+√3}(3) {x|x/1=x,x∈R}______{x|x的立方-x=0}(4)设U=R,A={x|a≤x≤b}
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计算:2x/(x-2)(x+1)÷(1-x/x+1)-x²+2x/x²-4?