题目

谁有matlab或mathematics帮我解下两个方程
1:
105.8=0.003*a+5*b
392=0.008*a+2*d
470.4=9*b+d+2*c
888.8+5*b+c+d=0.999a
2:
52.5＝x*10^(6.95805-1346.773/(y+219.693))
97.5=(1-x)*10^(7.06623-1507.434/(y+214.985))
thanks

提问时间：2021-04-01

答案

s=solve('105.8=0.003*a+5*b','392=0.008*a+2*d',...
'470.4=9*b+d+2*c','888.8+5*b+c+d=0.999*a')
s =
a:[1x1 sym]
b:[1x1 sym]
c:[1x1 sym]
d:[1x1 sym]
>> s.a
ans =
1230.9797263557375411964446219914
>> s.b
ans =
20.421412164186557475282133226805
>> s.c
ans =
47.76560471387196644362328972336
>> s.d
ans =
191.07608109457704983521422151203
>> f=solve('52.5=x*10^(6.95805-1346.773/(y+219.693)),97.5=(1-x)*10^(7.06623-1507.434/(y+214.985))')
f =
x:[1x1 sym]
y:[1x1 sym]
>> f.y
ans =
86.012332547429901454968924587361
>> f.x
ans =
0.14708573837127572260795599716737