1-8x+16x²=2-8x

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x^8+x^6+x^4+x^2+1因式分解

symsx>>factor(x^8+x^6+x^4+x^2+1)ans=(x^4-x^3+x^2-x+1)*(x^4+x^3+x^2+x+1)MATLAB编程所得结果!

|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|

|x-1|+|x-10|表示数轴上x到1的距离+x到10的距离.显然最小值是9,此时x只要在1到10之间就好.类似的,|x-2|+|x-9|的最小值是7,此时x在2到9之间就好.|x-3|+|x-8|

y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1

设a=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)那么y=a*(x-10);那么y^=a^*(x-10)+a*(x-10)^=a^*(x-10)+a那么y

设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),

 再问:额、不懂再答: 再答:后面的看做一个整体再问:好的吧、谢谢大神再答:回来的话,请采纳再问:啊、突然明白了呢。。。

已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值

x+x^2+x^3+x^4+x^5+x^6+x^7+x^8=(x+x^2+x^3+x^4)+(x^5+x^6+x^7+x^8)=x(1+x+x^2+x^3)+x^5(1+x+x^2+x^3)=(x+x

解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1

(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=(x/2)*(2/x(x+2))+(2/(x+2)(x+4))+.+2/(x+8)(x+10)=(x/2)*[1/x

x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6)谁会解这道方程题

x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6)1+2/(x-2)+1-2/(x-7)=1+2/(x-1)+1-2/(x-6)1/(x-2)-1/(x-7)=1/

(x^2 + 4x)(x^2 + 4x+8)+16

(x^2+4x)(x^2+4x+8)+16=(x^2+4x)^2+8(x^2+4x)+16=(x^2+4x+4)^2=(x+2)^4

已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值

1+x+x^2+x^3=0x+x^2+x^3+x^4+x^5+x^6+x^7+x^8=(x+x^2+x^3+x^4)+(x^5+x^6+x^7+x^8)=x(1+x+x^2+x^3)+x^5(1+x+

[1/(x-1)(x+2)]+[1/(x+2)(x+5)]+[1/(x+5)(x+8)]+[1/(x+8)(x+11)]

[1/(x-1)(x+2)]+[1/(x+2)(x+5)]+[1/(x+5)(x+8)]+[1/(x+8)(x+11)]=(1/3x-3)-1/24(1/3)[1/(x-1)-1/(x+11)]=1/

计算(x+/1x)(x^2+1/x^2)(x^4+1/x^4)(x^8+1/x^8)(x^16+1/x^16)(x^2-

(x+1/x)(x^2+1/x^2)(x^4+1/x^4)(x^8+1/x^8)(x^16+1/x^16)(x^2-1)乘以(x-1/x)后同时再除以它=(x-1/x)(x+1/x)(x^2+1/x^

x+2/x+3-x+1/x+2=x+8/x+9-x+7/x+8

(x+2)/(x+3)-(x+1)/(x+2)=(x+8)/(x+9)-(x+7)/(x+8)(x+2)²/[(x+2)(x+3)]-(x+1)(x+3)/[(x+2)(x+3)]=(x+8

(x^2+4x)(x^2+4x+8)+16

(x^2+4x)(x^2+4x+8)+16先把(x^2+4x)看做一个整体=(x^2+4x)^2+8(x^2+4x)+4^2=[(x^2+4x)+4]^2再问:从(x^2+4x)(x^2+4x+8)+

x/2+x/8+x/12+x/20=1

60X+15X+10X+6X=12091X=120X=120/91

化简:1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+8)(x+9)

化简:1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+8)(x+9)=1/x-1/(x+1)+1/(x+1)-1/(x+2)+1/(x+2)-1/(x+3)+.

X-5+8*X=7*X-2*X-1

变形得9X—5=5X—1得4X=4得X=1再答:有不懂的再问再问:对啊……我就是想知道怎么变形……不过你这个比较详细一些……再问:右边是7-2变形,那左边是……再答:就是把未知数X移到一边再问:右边是

初中数学解方程x/x-2+x-9/x-1等于x+1/x-1+x-8/x-6

x=1再问:过程再答:再答:专门为你写的

因式分解x^8+x^6+x^4+x^2+1

有两个公式a5+b5=(a+b)(a^4-a^3b+a^2b^2-ab^3+b^4)a5-b5=(a-b)(a^4+a^3b+a^2b^2+ab^3+b^4)原式x^8+x^6+x^4+x^2+1=(

(3-x)/(1-x)-(5-x)/(7-x)+(x^2-x)/(x^2-8x+7)=1

解(x-3)(x-7)/(x^2-8x+7)-(x-5)(x-1)/(x^2-8x+7)+(x^2-x)/(x^2-8x+7)=1x^2-10x+21-(x^2-6x+5)+x^2-x=x^2-8x+

方程x+1x+2+x+8x+9=x+2x+3+x+7x+8

原方程变形为:x+1x+2-x+2x+3=x+7x+8-x+8x+9,去分母,得(x+2)(x+3)=(x+8)(x+9),整理,得12x+66=0,解得x=-5.5,经检验,x=-5.5是原方程的解