Python | sympy.rf() method

With the help of sympy.rf() method, we can find the Rising factorial. Rising factorial is defined by –

where x can be arbitrary expression and k is an integer.

Syntax: rf(x, k) Parameter: x – It denotes any arbitrary expression. k – It denotes an integer. Returns: Returns rising factorial corresponding to the given inputs.

Example #1:

# import sympy
from sympy import *

x = symbols('x')
k = 5
print("Value of x = {} and k = {}".format(x, k))

# Use sympy.rf() method
rf_x_k = rf(x, k)

print("Rising factorial rf(x, k) : {}".format(rf_x_k))

Output:

Value of x = x and k = 5
Rising factorial rf(x, k) : x*(x + 1)*(x + 2)*(x + 3)*(x + 4)

Example #2:

# import sympy
from sympy import *

x = 7
k = 5
print("Value of x = {} and k = {}".format(x, k))

# Use sympy.rf() method
rf_x_k = rf(x, k)

print("Rising factorial rf(x, k) : {}".format(rf_x_k))

Output:

Value of x = 7 and k = 5
Rising factorial rf(x, k) : 55440