1.2005^0 — 2^2 + (1/3)^-12.4/a^2-4 + 2/a+2 —1/a-2分式解方程:3.5/x-1 = 3/x+14.1-x/x-2 = (1/2-x) -25.a/x-a +b = 1 (b不等1)6.(a-b+4ab/a-b)(a+b-4ab/a+b)填空题:7.当X=______时,分式4-x/x-3无意义;当X=______时,分式x^2-9/
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/08 22:56:04
1.2005^0 — 2^2 + (1/3)^-12.4/a^2-4 + 2/a+2 —1/a-2分式解方程:3.5/x-1 = 3/x+14.1-x/x-2 = (1/2-x) -25.a/x-a +b = 1 (b不等1)6.(a-b+4ab/a-b)(a+b-4ab/a+b)填空题:7.当X=______时,分式4-x/x-3无意义;当X=______时,分式x^2-9/
1.2005^0 — 2^2 + (1/3)^-1
2.4/a^2-4 + 2/a+2 —1/a-2
分式解方程:
3.5/x-1 = 3/x+1
4.1-x/x-2 = (1/2-x) -2
5.a/x-a +b = 1 (b不等1)
6.(a-b+4ab/a-b)(a+b-4ab/a+b)
填空题:
7.当X=______时,分式4-x/x-3无意义;当X=______时,分式x^2-9/x-3的值为0.
8.科学计数法表示:—0.000 0064=___________
9.分式2/x^2+2x 与 3/x^2-4的最简公分母是________
1.2005^0 — 2^2 + (1/3)^-12.4/a^2-4 + 2/a+2 —1/a-2分式解方程:3.5/x-1 = 3/x+14.1-x/x-2 = (1/2-x) -25.a/x-a +b = 1 (b不等1)6.(a-b+4ab/a-b)(a+b-4ab/a+b)填空题:7.当X=______时,分式4-x/x-3无意义;当X=______时,分式x^2-9/
1.0 2.1\(a+2)
3.分式两边同时*(X-1)(X+1)得:5(X+1)=3(X-1):
移项得:2X= -3-5
解得:X= -4
4.原式可化为:X-1/X-2=X-3/2-X
通分得:X-1=3-X
解得:X=2
5.移项得:a/x=a-b
解得:x=(a-b)/a
6.原式=((a-b)^2+4ab)/(a-b))*((a+b)^2-4ab)/(a+b))
=(a+b)^2/(a-b)*(a-b)^2/(a+b)
=(a+b)(a-b)
=a^2-b^2
7.3 -3
8.-6.4*10^6
9.1/X^2
1.1-4+3=0 2.原试=4/a^2-4+2(a-2)/a^2-4-a+2 /a^2-4=10-A/a^2-4
3.分式两边同时*(X-1)(X+1)得:5(X+1)=3(X-1):
移项得:2X= -3-5
解得:X= -4
4.原式可化为:X-1/X-2=X-3/2-X
通分得:X-1=3-X
...
全部展开
1.1-4+3=0 2.原试=4/a^2-4+2(a-2)/a^2-4-a+2 /a^2-4=10-A/a^2-4
3.分式两边同时*(X-1)(X+1)得:5(X+1)=3(X-1):
移项得:2X= -3-5
解得:X= -4
4.原式可化为:X-1/X-2=X-3/2-X
通分得:X-1=3-X
解得:X=2
5.移项得:a/x=a-b
解得:x=(a-b)/a
6.原式=((a-b)^2+4ab)/(a-b))*((a+b)^2-4ab)/(a+b))
=(a+b)^2/(a-b)*(a-b)^2/(a+b)
=(a+b)(a-b)
=a^2-b^2
收起
5. a/x-a +b=1
a/x-a=1-b
a=(1-b)*(x-a)
a/1-b=x-a
x=a/1-b +a