解方程1x^2+3x+2+1x^2+5x+6+1x^2+7x+12+1x+4=32
题目
解方程1x^2+3x+2+1x^2+5x+6+1x^2+7x+12+1x+4=32
解方程1x^+3x+2 + 1x^2+5x+6 + 1x^2+7x+12 + 1x+4=32
答案
1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+1/(x+4)=3/2
1/(x+1)-1/(x+2)+1/(x+2)-1/(x+3)+1/(x+3)-1/(x+4)+1/(x+4)=3/2
1/(x+1)=3/2
x+1=2/3
x=-1/3
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