3x+10=8x

1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11=17.7这个方程怎么样求解?这是等比数列,可以看做F(X)=(X)^(N-1)求和公式S(N)=1*（1-X^N）/(1-X)=17.7(n=11)

1)1+x+x^2=0,求1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^10的值2)1+x+x^2=0,求1+x+x^2+x^3+……+x^20的值（1）原式=(1+x+x^2)+x^3(1+x+x^2)+x^6(1+

(x+3)(x+10)=(x-5)(x-11)=(x+8)(x-7)= 

1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少X(1+2+3+4+5+6+7+8+9+10+11)=1980,X66=1980等于3036

10X+（X-3)+10（X-3）+X+X+（X-3）=156X=812X+12（X-3）=156X+X-3=13X=8解:24x-36＝15624x＝192x＝8

3^x=2^x,求x.5^(x-1)·10^3x=8^x求x3^x=2^x两边除2^x(3/2)^x=1x=05^(x-1)*10^3x=8^x5^(x-1)*(5*2)^3x=5^(x-1)*5^3x*2^3x=(2^3)^x所以5^(x

解方程(x^2-10x+15)/(x^2-6x+15)=3x/(x^2-8x+15)交叉相乘有(x^2-8x+15)^2-2x(x^2-8x+15)=3x(x^2-8x+15)+6x^2(x^2-8x+15)^2-5x(x^2-8x+15)

一道数学分式方程(x-4)/(x-3)-(x-6)/(x-5)=(x-8)/(x-7)-(x-10)/(x-9)(x-3-1)/(x-3)-(x-5-1)/(x-5)=(x-7-1)/(x-7)-(x-9-1)/(x-9)1-1/(x-3)

(x+1)(x+2)(x+3)(x+4)(x+5)(x+6)(x+7)(x+8)(x+9)(x+10)请化简我说的是化简化成x^10+ax^9+bx^8+cx^7+......+n的形式x^10+55*x^9+1320*x^8+18150*

已知x/(x*x-x+10)=1/3求（x*x）/x*x+x+1的值错了,是x/(x*x-x+1)=1/3,求（x*x）/(x*x+x+1)的值.sorry.解答过程能给出么?根据x/（x^2-x+1）=1/3可得:x^2+1=4x,则x^

(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2=x^2+10x-24+x^2+15x+56-x^2+5x+50=x^2+30x+82=4+60+82=146其实,不化简,直接代入=14*0+9*10+7*8

1.(x+7)/(x+6)+(x+9)/(x+8)=(x+10)/(x+9)+(x+6)/(x+5)2.已知：-x+13/（x-5)(x+3)=A/(x-5)-B/(x+3).求A,B3.已知abc=1,求a/(ab+a+1)+b/(bc+

(x+7/x+6)+(x+9/x+8)=9x=(x+10/x+9)+(x+6/x+5)(x+7/x+6)+(x+9/+x+8)=(x+10/x+9)+(x+6/x+5)(x+9/+x+8)-(x+10/x+9)=(x+6/x+5)-(x+7

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))+

x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7x=?x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+71+1/(x+1)-1-1/(x+3)=1+1/x+5)-1-1/(x+7)1/(x+1)+1/(x+7)=1

X+X+X+(X-1)+(X-2)+(X-3)+(X-4)=10(X-3)+(X-4)7x-10=11x-34-4x=-24x=6

X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一 

（x+x+10+x+8)×3=36怎么解?

x+(x+10)+(x+8)=36×3要有过程X+X+10+X+8=1083X=90X=30

（x+10）+（X+8）+X\3=36