Exponential PDF

Problem

Exponential probability density function evaluated at x.

f(x) = lam * e^(-lam * x) for x >= 0 and 0 otherwise. Return 0.0 for negative lam.

case 1

in: [1,0]

expected: 1

case 2

in: [2,1]

expected: 0.2706705664732254

case 3

in: [0.5,4]

expected: 0.06766764161830635

case 4

in: [1,-1]

expected: 0

Starter codePython

import math


def exponential_pdf(lam, x):
    # Your code here
    pass

4 test cases · run your code against them in the editor