x+2分之x+1+x+9分之x+8+x+3分之x+2+x+8分之x+7 用分式方程做 具体过 ...
1\/(x+8)(x+9)=1\/(x+3)(x+2) 两边分别通分 (x+3)(x+2)=(x+8)(x+9) 分母相等 x²+5x+6=x²+17x+72 x=-11\/2 检验:……
初三数学 x+1\/x+2 + x+8\/x+9 = x+2\/x+3 + x+7\/x+8 解这个方程,谢谢
1、移项得(x+1)\/(x+2)-(x+2)\/(x+3)=(x+7)\/(x+8)-(x+8)\/(x+9)2、化简原式(x+1)\/(x+2)=(x+2-1)\/(x+2)=1-1\/(x+2)(x+2)\/(x+3)=(x+3-1)\/(x+3)=1-1\/(x+3)(x+7)\/(x+8)=(x+8-1)\/(x+8)=1-1\/(x+8...
初二数学 解分式方程:X+2\/X+1 +X+8\/X+7 = X+6\/X+5 + X+4\/X+3
(x+2)\/(x+1))-(x+4)\/(x+3))=((x+6)\/(x+5)-(x+8)\/(x+7)通分,2\/(x+1)(x+3)=2\/(x+5)(x+7)(x+1)(x+3)=(x+5)(x+7)x=-3\/2
x+2\\x+1-x+4\\x+3=x+6\\x+5-x+8\\x+7简便
(x+2)\/(x+1)-(x+4)\/(x+3)=(x+6)\/(x+5)-(x+8)\/(x+7)每个式子都减去1,就是从分子里减去分母,得到 1\/ (x+1)-1\/(x+3)=1\/(x+5)-1\/(x+7)移项,得到1\/(X+1)+1\/(X+7)=1\/(X+5)+1\/(X+3)合并得到(2X+8)\/(X+1)(X+7)=(...
f(x)=1\/(x+1)(x+2)+1\/(x+2)(x+3)+1\/(x+3)(x+4)+...1\/(x+9)(x+10...
解答:f(x)=1\/(x+1)(x+2)+1\/(x+2)(x+3)+1\/(x+3)(x+4)+...1\/(x+9)(x+10)=1\/(x+1)-1\/(x+2)+1\/(x+2)-1\/(x+3)+1\/(x+3)-1\/(x+4)+...+1\/(x+9)-1\/(x+10)=1\/(x+1)-1\/(x+10)属于裂项求和 ∴ f(8)=1\/9-1\/18=1\/18 ...
x+2分之x+3分之x+1<1+6分之x+8 求解 是否为:x<1.2
x+2分之x+3分之x+1<1+6分之x+8 两边同乘以6 6x+3x+2(x+1)<6+x+8 9x+2x+2<14+x 11x-x<14-2 10x<12 x<1.2 (-1\/6+3\/4-1\/12)×(-48)=8-36+4 =-24 你的答案是对的
解方程数学问题x+1\/x+2+x+2\/x+3=x+3\/x+4+x+4\/x+5
解:1-1\/﹙x+2﹚+1-1\/﹙x+3﹚=1-1\/﹙x+4﹚+1-1\/﹙x+5﹚1\/﹙x+2﹚+1\/﹙x+3﹚=1\/﹙x+4﹚+1\/﹙x+5﹚1\/﹙x+2﹚-1\/﹙x+4﹚=1\/﹙x+5﹚-1\/﹙x+3﹚2\/﹙x²+6x+8﹚=﹣2\/﹙x²+8x+15﹚x²+8x+15=﹣x²-6x...
解方程:1\\x(x+1)+1\\(x+1)(x+2)+...+1\/(x+8)(x+9)=2x+3\\x(x+9)_百度...
最后一项是(2x+3)\\x(x+9)还是 2x+3\\x(x+9)若是(2x+3)\\x(x+9)解由1\\x(x+1)+1\\(x+1)(x+2)+...+1\/(x+8)(x+9)=2x+3\\x(x+9)得1\/x-1\/(x+1)+1\/(x+1)-1\/(x+2)+...+1\/(x+8)-1\/(x+9)=2x+3\/x(x+9)即1\/x-1\/(x+9)=(2x+3)\/x(x+9...
x+2分之x+4-x²分之8=x-2分之x+2解方程
X^3+2x^2-8==0
x+二分之一x+四分之一+八分之一x+十六分之一x十三十二分之一x=378?
提取公因式x得:x(1 + 1\/2 + 1\/4 + 1\/8 + 1\/16 + 1\/32)=x[1\/32×(32 + 16 + 8 + 4 + 2 + 1)]=x(1\/32 × 63)∴原方程化为:(63\/32)x=378 则x=378×(32\/63)∴x=192