ykzcs2000的博客

from sympy import *定义一个数学符号xx, y = symbols(‘x y’)定义一个数学表达式exam = 3x**4 + 5x3 + x2 + 8*x + 6======================求导求导print(exam.diff(x))print(diff(exam, x))结果：12x**3 + 15x**2 + 2*x + 8求二次导print(exam.diff(x, x))print(diff(exam, x, x))结果：2*(18x*