作业帮matlab解三元一次符号方程组,出不来需要的结果.[B1 B2 B3]=solve('(m1*s^2+(c1+c2)*s+k1+k2)*B1+(-c2*s-k2)*B2+(-c2*s-k2)*B3=F','(-c2*s-k2)*B1+(m1*s^2+(c1+c2)*s+k1+k2)*B2+(c2*s+k2)*B3=F','(-c2*s-k2)*B1+(c2*s+k2)*B2+(m2*s^2+c2*s+k2)*B3=0')
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/15 12:02:28
![matlab解三元一次符号方程组,出不来需要的结果.[B1 B2 B3]=solve('(m1*s^2+(c1+c2)*s+k1+k2)*B1+(-c2*s-k2)*B2+(-c2*s-k2)*B3=F','(-c2*s-k2)*B1+(m1*s^2+(c1+c2)*s+k1+k2)*B2+(c2*s+k2)*B3=F','(-c2*s-k2)*B1+(c2*s+k2)*B2+(m2*s^2+c2*s+k2)*B3=0')](/uploads/image/z/6845173-61-3.jpg?t=matlab%E8%A7%A3%E4%B8%89%E5%85%83%E4%B8%80%E6%AC%A1%E7%AC%A6%E5%8F%B7%E6%96%B9%E7%A8%8B%E7%BB%84%2C%E5%87%BA%E4%B8%8D%E6%9D%A5%E9%9C%80%E8%A6%81%E7%9A%84%E7%BB%93%E6%9E%9C.%5BB1+B2+B3%5D%3Dsolve%28%27%28m1%2As%5E2%2B%28c1%2Bc2%29%2As%2Bk1%2Bk2%29%2AB1%2B%28-c2%2As-k2%29%2AB2%2B%28-c2%2As-k2%29%2AB3%3DF%27%2C%27%28-c2%2As-k2%29%2AB1%2B%28m1%2As%5E2%2B%28c1%2Bc2%29%2As%2Bk1%2Bk2%29%2AB2%2B%28c2%2As%2Bk2%29%2AB3%3DF%27%2C%27%28-c2%2As-k2%29%2AB1%2B%28c2%2As%2Bk2%29%2AB2%2B%28m2%2As%5E2%2Bc2%2As%2Bk2%29%2AB3%3D0%27%29)
matlab解三元一次符号方程组,出不来需要的结果.[B1 B2 B3]=solve('(m1*s^2+(c1+c2)*s+k1+k2)*B1+(-c2*s-k2)*B2+(-c2*s-k2)*B3=F','(-c2*s-k2)*B1+(m1*s^2+(c1+c2)*s+k1+k2)*B2+(c2*s+k2)*B3=F','(-c2*s-k2)*B1+(c2*s+k2)*B2+(m2*s^2+c2*s+k2)*B3=0')
matlab解三元一次符号方程组,出不来需要的结果.
[B1 B2 B3]=solve('(m1*s^2+(c1+c2)*s+k1+k2)*B1+(-c2*s-k2)*B2+(-c2*s-k2)*B3=F','(-c2*s-k2)*B1+(m1*s^2+(c1+c2)*s+k1+k2)*B2+(c2*s+k2)*B3=F','(-c2*s-k2)*B1+(c2*s+k2)*B2+(m2*s^2+c2*s+k2)*B3=0')
求的是B1,B2,B3的表达式.
matlab解三元一次符号方程组,出不来需要的结果.[B1 B2 B3]=solve('(m1*s^2+(c1+c2)*s+k1+k2)*B1+(-c2*s-k2)*B2+(-c2*s-k2)*B3=F','(-c2*s-k2)*B1+(m1*s^2+(c1+c2)*s+k1+k2)*B2+(c2*s+k2)*B3=F','(-c2*s-k2)*B1+(c2*s+k2)*B2+(m2*s^2+c2*s+k2)*B3=0')
后面加上未知量的限定就好啦：
[B1 B2 B3]=solve('(m1*s^2+(c1+c2)*s+k1+k2)*B1+(-c2*s-k2)*B2+(-c2*s-k2)*B3=F','(-c2*s-k2)*B1+(m1*s^2+(c1+c2)*s+k1+k2)*B2+(c2*s+k2)*B3=F','(-c2*s-k2)*B1+(c2*s+k2)*B2+(m2*s^2+c2*s+k2)*B3=0','B1','B2','B3')
B1 =
F/(m1*s^2+s*c1+k1)
B2 =
F/(m1*s^2+s*c1+k1)
B3 =
0