1/(x+2)(x+4)+1/(x+4)(x+6)+1/(x+6)(x+8)=2/(3x+24)两边同×2得2/(x+2)(x+4)+2/(x+4)(x+6)+2/(x+6)(x+8)=4/(3x+24）1/(x+2)-1/(x+4)+1/(x+4)-1/(x+6)+1/(x+6)-1/(x+8)=4/3(x+8)1/(x+2)-1/(x+8)=4/3(x+8)3(x+8)-3(x+2...