8×十9x十10x十16x
1十3十5十7十9十11十、、、、、、十99=()=()x()
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
2x十8十3x十8十4x十8=?请算出这道题目求士寸佰了⑥
(x十3)(x一3)十8>(x十5)(x一1)解不等式
2(x十3)=3(0.5x十10)
x十5十x十6…=1000
X十1十4/5X=1十7/8(X-1)十(X一1)怎么算
(2Xx10十X)=10X十2X十36
16+0.2x=0.25x十9求x!
10x十x=5500求解?
1十2十3十4十5十6十7十8十9十10二?