神马品牌网青岛市红岛经济开发区:已知关于x 的方程a/(x+1)+2/(x+2)=5/x+4/(x+6)，求x的值.
来源：百度文库 编辑：神马品牌网 时间：2024/04/28 05:49:53
a/(x+1)+2/(x+2)=5/x+4/(x+6)
x有三个根，好复杂啊，俺用Matlab算的。
x=
[ 1/3/(a-7)*(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3)+1/3*(-148*a-167+28*a^2)/(a-7)/(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3)-1/3*(-43+8*a)/(a-7)]
[ -1/6/(a-7)*(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3)-1/6*(-148*a-167+28*a^2)/(a-7)/(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3)-1/3*(-43+8*a)/(a-7)+i*(1/6/(a-7)*(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3)-1/6*(-148*a-167+28*a^2)/(a-7)/(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3))*3^(1/2)]
[ -1/6/(a-7)*(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3)-1/6*(-148*a-167+28*a^2)/(a-7)/(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3)-1/3*(-43+8*a)/(a-7)+i*(-1/6/(a-7)*(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3)+1/6*(-148*a-167+28*a^2)/(a-7)/(3306*a-10835+264*a^2-80*a^3+36*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2)*a-252*(-12*a^4+68*a^3+69*a^2-384*a+1922)^(1/2))^(1/3))*3^(1/2)]
这是几年级的题目啊
饿的娘啊
看到LZ的这个帖子
饿一下就疯了~!!!!
LZ这丫真可怜~!!!!
现在老师给娃出的题咋这难的么？
偶该上中学了，不会解
蜀道之难,难于上青天
这么难,还是有人上,哈哈