I am trying to integrate e^(-x)
from 0
to 1
using sympy
but I am getting the following error:
ValueError: Invalid limits given: ((exp(-x), 0, 1),)
Here is my code:
from sympy import *
x = Symbol('x')
exact_value = integrate(exp(-x), (exp(-x), 0, 1))
Following the documentation the only problem is the tuple you establish as a limit (exp(-x), 0, 1) , since it has to be (x, 0, 1) following the previously mentioned structure.
So the edited code would be:
from sympy import *
x = Symbol('x')
exact_value = integrate(exp(-x), (x, 0, 1))
I'm pretty sure you want to integrate over x, not e^-x, so that would be:
exact_value = integrate(exp(-x), (x, 0, 1))
The results is:
1 - exp(-1)
The correct way to do this is:
>>> from sympy import *
>>> x = symbols('x')
>>> integrate(exp(-x), (x, 0, 1))
1 - exp(-1)
Source: integrate
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