1-2 x-6

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1-2 x-6
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+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3

(x+1-1/1-x)÷(x-x²/x-1)=[(x+1)+1/(x-1)]×[-(x-1)/x(x-1)]=(x²-1+1)/(x-1)×(-1/x)=-x/(x-1)(x-4/

(5x+1)X(6x+2)

解什么啊,就不是方程

|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

求化简:(x^2+3x+9)/(x^2-27)+(6x)/(9x-x^2)-(x-1)/(6+2x)

(X²+3X+9/X²-27)+(6X/9X-X²)-(X-1/6+2X)=X²+3X+9/X²-27+6/9-X²-X+1/6+2X=9/

6/x+1=x-5/x^2+x

6/x+1=x-5/x^2+x6/x+1=x-5/x(x+1)两边同乘x(x+1)6x=x-5x=-1但是x(x+1)≠0x≠0或-1所以该方程无解

化简(x^2+3x+9)/(x^3-27)+(6x)/(9x-x^2)-(x-1)/(6+2x)

是9x-x³原式=(x²+3x+9)/(x-3)(x²+3x+9)-6x/x(x-3)(x+3)-(x-1)/2(x+3)=1/(x-3)-6/(x-3)(x+3)-(x

x+2/x^2-x-6 + 2x/x^3-3x - x+1/x^2-6x+9

中间错了原式=(x+2)/(x-3)(x+2)+2x/x(x-3)-(x+1)/(x-3)²=1/(x-3)+2/(x-3)-(x+1)/(x-3)²=3/(x-3)-(x+1)/

(x+7)(x+6)-(x-2)(x+1)=?

(x+7)(x+6)-(x-2)(x+1)=x^2+13x+42-x^2+x+2=14x+44=2(7x+22)

解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)

x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)x/(x-2)=2x/(x-3)+(1-x)/(x-2)(x-3)x(x-3)/(x-2)(x-3)=2x(x-2)/(x-2)(x-3)

(x+2/x^2-x-6)-(2x/x^2-3x)-(x+1/x^2-6x+9)

原式=(x+2)/(x+2)(x-3)-2x/x(x-3)-(x+1)/(x-3)²=1/(x-3)-2/(x-3)-(x+1)/(x-3)²=-1/(x-3)-(x+1)/(x-

1/(x+3)-(x-2)/(x^2-5x+6)

原式=(x+3)分之1-(x-2)(x-3)分之(x-2)=(x+3)分之1-(x-3)分之1=[(x+3)(x-3)]分之[(x-3)-(x+3)]=(x²-9)分之(-6)=-(x

(x+2)(x-3)(x-6)(x-1)=0

有种方法叫做穿针引线法,需要在纸上画出函数的简图,这个题的答案应该是-2,3,6,1

6x+(2x²-3x)-(x²-1)

=6x+2x²-3x-x²+1=x²+3x+1

X^2+X分之6=X^2+X+1

左右都有X^2,故把它们都约去,剩下X分之6=X+1两边都乘以x得6=x平方+x移项x平方+x-6=0因式分解(x-3)(x+2)=0解得x=3或x=-2

计算:(x+1)(x-2)(x-3)(x-6)

(x+1)(x-2)(x-3)(x-6)==(x+1)(x-6)(x-2)(x-3)=(x^2-5x-6)(x^2-5x+6)=(x^2-5x)^2-36=x^4-10x^3+25x^2-36

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=(

(x-6)×(x-3) (x+2/1)×(x-3/1)

(x-6)×(x-3)(x-a)(x-b)x²-bx-ax+ab=x²-9x+18(x+2/1)×(x-3/1)(x+a)(x-b)x²-bx+ax-ab=x²