擅长:python、mysql、java
<p>对于这个任务,您必须使用python的符号模块(<a href="https://www.sympy.org/en/index.html" rel="nofollow noreferrer">sympy</a>),因为您特别希望输出是多项式表示。下面的代码应该可以完成这项工作。你知道吗</p>
<pre><code>import sympy
from sympy import poly
x = sympy.Symbol('x') # Create a symbol x
coefficients = [1,-2,5] # Your coefficients a python list
p1 = sum(coef*x**i for i, coef in enumerate(reversed(coefficients))) # expression to generate a polynomial from coefficients.
print p1 # print(p1), depending on your python version
</code></pre>
<p>这个语句:<code>p1.subs('x',2)</code>然后在x=2处计算多项式'p1'。你知道吗</p>