(7/8十5/16)X(2/3一1/15)=?
1/(x^2一4x十3)十1/(x^2一8x十15)十1/(x^2-12x十35)十1/(x^2一16x十63)=
已知1十x十x^2 十x^3=0,求x十x^2十x^3十x^4+x^5十x^6+x^7十x^8的值
7(x十4)=2(2一x)十3(4x一2) 6(2x一7)=5(x十8)十9 5(1十2x)=3(x一2)十3(17一x
X十1十4/5X=1十7/8(X-1)十(X一1)怎么算
(7/8十5/16)X(2/3一1/15)=?
5x十2x=42 15十2x一3=48 2x十3x十17=37 6x一3x=6÷5 9x一2x=1
(x十3)(x一3)十8>(x十5)(x一1)解不等式
设(3x一1)^8=a8x^8十a7x^7十…a1x十ao 求(1) a8十a7十…十a1 (2) a8十a6十a4十a
1十2十3十4十5十6十7十8十9十10=
1/2(2X十5)=4x十3/4一2一3x/8,解方程
1十2十3十4十5十6十7十8十9十1028一1000
3x十7x十5x一7x=17十18