Question

求解一元四次方程！急！有matlab，mathematica的同学来帮忙啊，会解的也来看看吧。

d^4-1.24*10^(-4)d-1.296*10^(-5)=0
d为所求未知数。谢谢大哥们了。

Answer 1

用Mathematica这样求解
Solve[d^4 - 1.24 10^-4 d - 1.296 10^-5 == 0, d]
答案是：
{{d -> -0.0508017}, {d -> -0.00860384 -
0.0606388 I}, {d -> -0.00860384 + 0.0606388 I}, {d -> 0.0680094}}

两个虚数解，两个实数解

Answer 2

>> syms d
>> solve('d^4-1.24*10^(-4)*d-1.296*10^(-5)=0')
d=
-0.050801692118558163401794814932321

0.068009368706260872449741986635395
0.060638841598048343021479544798633*i - 0.0086038382938513545239735858515369
- 0.060638841598048343021479544798633*i - 0.0086038382938513545239735858515369