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/
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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/
1.2005^0 — 2^2 + (1/3)^-1
=1-4+3
=0
3.5/x-1 = 3/x+1
5-x=3+x
2=2x
x=1
4.1-x/x-2 = (1/2-x) -2
1-1-2=(1/2-x) -2
0=1/2-x
x=1/2
5.a/x-a +b = 1
x=a-ax+bx
6.(a-b+4ab/a-b)(a+b-4ab/a+b)
=(a-2b+4b)(a+2b-4b)
=(a+2b)(a-2b)
=a^2-4b^2
7.x貌似等于 0
8.-6.4*10^-6
9.2/x^2+2
1. 2005^0 =1
2^2 =4
(1/3)^-1=3
1-4+3=0
2. 4/a^2-4 + 2/a+2 —1/a-2中
2/a+2 —1/a-2=(2a-4-a-2)/a^2-4
=(a-6)/a^2-4
原式=(4+a-6)/a^2-4=(a-2)/a^2-4=1/a+2
3. 5/x-1 = 3/x+1
得:5x+5=3x-3,所以2x=-8,x=-4
剩下的看别人吧,累死了
000
累,不会的叫我