(x+6)/(x+5)+(x+10)(x+9)=(x+7)/(x+6)+(x+9)/(x+8)
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(x+6)/(x+5)+(x+10)(x+9)=(x+7)/(x+6)+(x+9)/(x+8)(x+6)/(x+5)+(x+10)(x+9)=(x+7)/(x+6)+(x+9)/(x+8)(x+6)/
(x+6)/(x+5)+(x+10)(x+9)=(x+7)/(x+6)+(x+9)/(x+8)
(x+6)/(x+5)+(x+10)(x+9)=(x+7)/(x+6)+(x+9)/(x+8)
(x+6)/(x+5)+(x+10)(x+9)=(x+7)/(x+6)+(x+9)/(x+8)
(x+6)/(x+5)
=(x+5+1)/(x+5)
=(x+5)/(x+5)+1/(x+5)
=1+1/(x+5)
同理
1+1/(x+5)+1+1/(x+9)=1+1/(x+7)+1+1/(x+8)
通分
(2x+14)/(x²+14x+45)=(2x+14)/(x²+14x+56)
(2x+14)[1/(x²+14x+45)-1/(x²+14x+56)]=0
因为x²+14x+45≠x²+14x+56
所以1/(x²+14x+45)-1/(x²+14x+56)≠0
所以2x+14=0
x=-7
经检验,x=-7是方程的根
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填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
(x+7/x+6) +(x+9/x+8)=9x=(x+10/x+9) +(x+6/x+5)
1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少
已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10|
已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10)
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?
解方程:(x+7/x+6)+(x+9/x+8)=(x+10/x+9)+(x+6/x+5)
(X+7)/(X+6)+(X+9)/(X+8)=(X+10)/(X+9)+(X+6)/(X+5)
解方程X+7/X+6+X+9/X+8=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+6)/(x+5)+(x+10)(x+9)=(x+7)/(x+6)+(x+9)/(x+8)
x-4/x-6+x-8/x-10=x-5/x-7+x-7/x-9
化简:x平方-x-2/x平方-x-6除以x平方+4x-5/x平方+2x-10
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
15X(4X-8)-5X(2X+10)=6X(5X-20)
4(x+5)(x+6)(x+10)(x+12)-3x*x
(x+3x+5x...+2009x)-(2x+4x+6x+...+2010x)