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查看完整版本 : [求助] 如何求解该方程组


jacob@shanghai
2008-11-08, 14:44
方程组如下,12个参数,12个方程,可是一直报错误,为什么?请各位指点

[a,b,c,d,e,f,g,h,i,j,k,l]=solve('0.6103515625*a+0.6103515625^2*b+0.6103515625^3*c+0.6103515625^4*d+0.6103515625^5*e+0.6103515625^6*f+0.6103515625^7*g+0.6103515625^8*h+0.6103515625^9*i+0.6103515625^10*j+0.6103515625^11*k+0.6103515625^12*l=0','0.67138671875*a+0.67138671875^2*b+0.67138671875^3*c+0.67138671875^4*d+0.67138671875^5*e+0.67138671875^6*f+0.67138671875^7*g+0.67138671875^8*h+0.67138671875^9*i+0.67138671875^10*j+0.67138671875^11*k+0.67138671875^12*l=0.5','0.732421875*a+0.732421875^2*b+0.732421875^3*c+0.732421875^4*d+0.732421875^5*e+0.732421875^6*f+0.732421875^7*g+0.732421875^8*h+0.732421875^9*i+0.732421875^10*j+0.732421875^11*k+0.732421875^12*l=6.1','0.79345703125*a+0.79345703125^2*b+0.79345703125^3*c+0.79345703125^4*d+0.79345703125^5*e+0.79345703125^6*f+0.79345703125^7*g+0.79345703125^8*h+0.79345703125^9*i+0.79345703125^10*j+0.79345703125^11*k+0.79345703125^12*l=21.7','0.8544921875*a+0.8544921875^2*b+0.8544921875^3*c+0.8544921875^4*d+0.8544921875^5*e+0.8544921875^6*f+0.8544921875^7*g+0.8544921875^8*h+0.8544921875^9*i+0.8544921875^10*j+0.8544921875^11*k+0.8544921875^12*l=75.4','0.91552734375*a+0.91552734375^2*b+0.91552734375^3*c+0.91552734375^4*d+0.91552734375^5*e+0.91552734375^6*f+0.91552734375^7*g+0.91552734375^8*h+0.91552734375^9*i+0.91552734375^10*j+0.91552734375^11*k+0.91552734375^12*l=267.4','0.946044921875*a+0.946044921875^2*b+0.946044921875^3*c+0.946044921875^4*d+0.946044921875^5*e+0.946044921875^6*f+0.946044921875^7*g+0.946044921875^8*h+0.946044921875^9*i+0.946044921875^10*j+0.946044921875^11*k+0.946044921875^12*l=527.9','0.9765625*a+0.9765625^2*b+0.9765625^3*c+0.9765625^4*d+0.9765625^5*e+0.9765625^6*f+0.9765625^7*g+0.9765625^8*h+0.9765625^9*i+0.9765625^10*j+0.9765625^11*k+0.9765625^12*l=1158.7','0.98876953125*a+0.98876953125^2*b+0.98876953125^3*c+0.98876953125^4*d+0.98876953125^5*e+0.98876953125^6*f+0.98876953125^7*g+0.98876953125^8*h+0.98876953125^9*i+0.98876953125^10*j+0.98876953125^11*k+0.98876953125^12*l=1733.7','0.994873046875*a+0.994873046875^2*b+0.994873046875^3*c+0.994873046875^4*d+0.994873046875^5*e+0.994873046875^6*f+0.994873046875^7*g+0.994873046875^8*h+0.994873046875^9*i+0.994873046875^10*j+0.994873046875^11*k+0.994873046875^12*l=2263.9','0.9979248046875*a+0.9979248046875^2*b+0.9979248046875^3*c+0.9979248046875^4*d+0.9979248046875^5*e+0.9979248046875^6*f+0.9979248046875^7*g+0.9979248046875^8*h+0.9979248046875^9*i+0.9979248046875^10*j+0.9979248046875^11*k+0.9979248046875^12*l=2732.7','a+b+c+d+e+f+g+h+i+j+k+l=3696')

多谢!!!

zhanhuichong
2008-11-08, 17:36
这个式子太复杂 符号没法求解
建议使用数值求解 使用fsolve函数即可
具体可以到www.matlabsky.cn看看

jacob@shanghai
2008-11-09, 21:29
多谢多谢!