matlab解四元一次方程[a,b,c,d]=solve('124.3=a*1.364*1.364*exp(b)+130*(1-c*1.364*exp((-130)*d))','120.9=a*(1.818^2)*exp(b)+130*(1-c*1.818*exp((-130)*d))','117.4=a*(2.273^2)*exp(b)+130*(1-c*2.273*exp((-130)*d))','108=a*(3.123^2)*exp(b)+130*(1-c*3
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![matlab解四元一次方程[a,b,c,d]=solve('124.3=a*1.364*1.364*exp(b)+130*(1-c*1.364*exp((-130)*d))','120.9=a*(1.818^2)*exp(b)+130*(1-c*1.818*exp((-130)*d))','117.4=a*(2.273^2)*exp(b)+130*(1-c*2.273*exp((-130)*d))','108=a*(3.123^2)*exp(b)+130*(1-c*3](/uploads/image/z/5178300-60-0.jpg?t=matlab%E8%A7%A3%E5%9B%9B%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%5Ba%2Cb%2Cc%2Cd%5D%3Dsolve%28%27124.3%3Da%2A1.364%2A1.364%2Aexp%28b%29%2B130%2A%281-c%2A1.364%2Aexp%28%28-130%29%2Ad%29%29%27%2C%27120.9%3Da%2A%281.818%5E2%29%2Aexp%28b%29%2B130%2A%281-c%2A1.818%2Aexp%28%28-130%29%2Ad%29%29%27%2C%27117.4%3Da%2A%282.273%5E2%29%2Aexp%28b%29%2B130%2A%281-c%2A2.273%2Aexp%28%28-130%29%2Ad%29%29%27%2C%27108%3Da%2A%283.123%5E2%29%2Aexp%28b%29%2B130%2A%281-c%2A3)
matlab解四元一次方程[a,b,c,d]=solve('124.3=a*1.364*1.364*exp(b)+130*(1-c*1.364*exp((-130)*d))','120.9=a*(1.818^2)*exp(b)+130*(1-c*1.818*exp((-130)*d))','117.4=a*(2.273^2)*exp(b)+130*(1-c*2.273*exp((-130)*d))','108=a*(3.123^2)*exp(b)+130*(1-c*3
matlab解四元一次方程
[a,b,c,d]=solve('124.3=a*1.364*1.364*exp(b)+130*(1-c*1.364*exp((-130)*d))','120.9=a*(1.818^2)*exp(b)+130*(1-c*1.818*exp((-130)*d))','117.4=a*(2.273^2)*exp(b)+130*(1-c*2.273*exp((-130)*d))','108=a*(3.123^2)*exp(b)+130*(1-c*3.123*exp((-130)*d))','a','b','c','d')
结果输出是:a =
[ empty sym ]
b =
[]
c =
[]
d =
[]
matlab解四元一次方程[a,b,c,d]=solve('124.3=a*1.364*1.364*exp(b)+130*(1-c*1.364*exp((-130)*d))','120.9=a*(1.818^2)*exp(b)+130*(1-c*1.818*exp((-130)*d))','117.4=a*(2.273^2)*exp(b)+130*(1-c*2.273*exp((-130)*d))','108=a*(3.123^2)*exp(b)+130*(1-c*3
你说的那个可不是四元一次方程组哦,这个非线性方程组,一般只能用数值解法,solve函数就不行了.
用fsolve取适当的初值是可以解出的