Python| sympy.expand_pow_exp() 方法
借助sympy.expand_pow_exp()方法,我们可以使用以下恒等式展开数学表达式——
x(a+b) = xa.xb
Syntax: expand_pow_exp(expression)
Parameters:
expression – It is the mathematical expression which needs to be expanded.
Returns: Returns an expanded mathematical expression corresponding to the input expression.
示例 #1:
在这个例子中,我们可以看到通过使用sympy.expand_pow_exp()方法,我们可以在幂方面展开数学表达式。
Python3
# import sympy
from sympy import *
x, a, b = symbols('x a b')
expr = x**(a + b)
print("Before Expansion : {}".format(expr))
# Use sympy.expand_pow_exp() method
smpl = expand_pow_exp(expr)
print("After Expansion : {}".format(smpl))
Python3
# import sympy
from sympy import *
x, a, b = symbols('x a b')
expr = x**(2 * a + 3 * b)
print("Before Expansion : {}".format(expr))
# Use sympy.expand_pow_exp() method
smpl = expand_pow_exp(expr)
print("After Expansion : {}".format(smpl))
输出:
Before Expansion : x**(a + b)
After Expansion : x**a*x**b
示例 #2:
Python3
# import sympy
from sympy import *
x, a, b = symbols('x a b')
expr = x**(2 * a + 3 * b)
print("Before Expansion : {}".format(expr))
# Use sympy.expand_pow_exp() method
smpl = expand_pow_exp(expr)
print("After Expansion : {}".format(smpl))
输出:
Before Expansion : x**(2*a + 3*b)
After Expansion : x**(2*a)*x**(3*b)