Find the area bounded by the curve y = e-x, the X-axis and the Y-axis.
The given function is y = e−x.
When x = 0, y = e−0 = 1
When x increases, the value of y decrease.
Also, only when x = ∞, y = 0
So, the required area can be determined by integrating the function from 0 to ∞.