解方程 (100-X)×4-2X=28 怎么解
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![解方程 (100-X)×4-2X=28 怎么解](/uploads/image/f/7207749-45-9.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B+%28100-X%29%C3%974-2X%3D28+%E6%80%8E%E4%B9%88%E8%A7%A3)
(x+3)/(x+2)+(x+9)/(x+8)=(x+5)/(x+4)+(x+7)/(x+6)1+(x+5)/(x+2)(x+8)=1+(x+5)/(x+4)(x+6)x=-5再问:第二步那个1是怎么
((X-2)(X-4)-(X-3)^2)/(X-3)(X-4)=((X-5)(X-7)-(X-6)^2)/(X-6)(X-7),-1/(X^2-7X+12)=-1/(X^2-13X+42),6X=30
x(2x-4)+3x(x-1)=5x(x-3)+82x²-4x+3x²-3x=5x²-15x+88x=8x=1
x/1*2+x/2*3+x/3*4+...+x/99*100=1x(1/1*2+1/2*3+1/3*4+...1/99*100)=1x(1-1/2+1/2-1/3+1/3-1/4+...+1/99-1
(x²-x+4)x-(x-1)(x²+2)=x+7x³-x²+4x-x³+x²-2x+2=x+72x+2=x+72x-x=7-2x=5
(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))+.+2/(x+8)(x+10)=(x/2)*[1/x
x^2-2x-3=0(x-3)(x+1)=0x=3,x=-1
解设大瓶为x,小瓶为(32-x),则4x+(32-x)÷2=1007x=168x=24小瓶为:32-24=8
X+(X*4+80)/2=100X+2X+40=1003X=100-403X=60X=60/3X=20
2x+4x+6x...+100x=1-(x+3x+5x+...+99x)x(2+4+6+...+100)=1-x(1+3+5+...99)x(2+4+6+...+100)+x(1+3+5+...+99
通分得[(x-8)(x-4)-(x-9)(x-3)]/(x-3)(x-4)=[(x+7)(x+3)-(x+2)(x+8)]/(x+8)(x+3)解得5/(x-3)(x-4)=5/(x+8)(x+3),
移项得2x+3x-4x=18合并同类项得X=18
(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)[(x-8)(x-4)-(x-9)(x-3)]/(x-3)(x-4)=[(x+7)(x+3)-(x+2)(
方程两边同乘以(x-2)(x+2),得(x-2)2+4=(x-2)(x+2),解得x=3.经检验:x=3是原方程的解.
首先由题意得x+1≠0,x+7≠0,x+5≠0,x+3≠0,即x≠-1,x≠-7,x≠-5,x≠-3,则先简化方程(x+1+1)/(x+1)+(x+7+1)/(x+7)=(x+5+1)/(x+5)+(
2x+4x+6x+8x+...+2010x+2012x=1013042x+2x+3x+4x+...+1005x+1006x=5065211006*1007x/2=506521x=1013042/100
1+2x+1/4x+1/2x=10011/4x=99x=36
【1】3x=x+1003x-x=1002x=100x=50【2】4x++14=28+3x4x-3x=28-14x=14
解题思路:高次方程的解法分解因式解题过程:
2x+4x+6x+8x~+2010x+2012x=1013042(2+2012)×1006÷2×x=1013042x=1再问:可以分解仔细点吗?再答:(2+2012)×1006÷2×x=1013042