若3X²-2X-1=0,6
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/19 05:21:00
x²+3x-1=0x²+3x=1(x-3)/(3x^2-6x)除以[x+2-5/(x-2)]=(x-3)/3x(x-2)÷(x²-4-5)/(x-2)=[(x-3)/3x
x*x+x+1=0(x-1)(x*x+x+1)=0x^3-1=0x^3=1x^7+2x^6+x^5+x^4+x^3+x*x+1=x^6*x+2x^6+x^3*x^2+x^3*x+x^3+x*x+1=x
(2007+1)÷4=502∴1+x+x^2+x^3+x^4+x^5+...+x^2007+x^2008-x^2008=1+x+x²+x³+x^4(1+x+x²+x
4/(x-2)+(x-1)/[(x-2)(x-3)]-2/(x-3)=0[4(x-3)+(x-1)-2(x-2)]/[(x-2)(x-3)]=03(x-3)/[(x-2)(x-3)]=0不知道解了~~
3x^2-x=1,6x^3+7x^2-5x+2009=2x(3x^2-x)+3(3x^2-x)-2x+2009=2x+3-2x+2009=2012
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
注意:本题x=2时题目没意义,应该舍去(这是很多学生错误所在)这里x只能取根号2-1
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+
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)
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
(x-3)/(3x^2-6x)/[x+2-(5)/(x-2)]=(x-3)/(3x)/(x-2)/[x+2-(5)/(x-2)]=(x-3)/(3x)/[(x+2)(x-2)-5]=(x-3)/(3x
3x^2+6x-1=3x^2+6x+9-9-1=(3x^2+6x+9)-9-1=3(x^2+2x-3)-10=-10
=x^2005*(x^3+x^2+x+1)=0再问:不太明白,过程能不能在具体些再答:=x^2005*x^3+x^2005*x^2+x^2005*x+x^2005*==x^2005*(x^3+x^2+
1,1/32,m=a^2+2b^2
x(x*x-1)+x(5-x*x)-6y+7=-x+5x-6y+7=2(2x-3y)+7=2*(-4)+7=-8+7=-1再问:能在写详一点吗-x+5x-6y+7再答:x(x*x-1)+x(5-x*x
若x²+3x-1/3=0则代数式x-3/3x²-6x÷(x+2-5/x-2)的值(x-3)/(3x²-6x)÷[(x+2)-5/(x-2)]=(x-3)/3x(x-2)÷
1,应该是x是几次幂就有几个根吧,所以应该是7+2=9个2.-7.036622145,-6.489288572,-6.200988153,-4.734373320,-4.289168546,-2.77
=x^2002(x^4+x^3+x^2+x+1)=0提取公因式就行了
x^2+x=1x^2=1-x2x^3-3x^2-x=2x(x^2+x)-5x^2-x=2x-5(1-x)-x=6x-5.