Problem 1: (Approximating the solution to a differential equation with a Taylor polynomial)
Consider the initial value problem:
frac{dy}{dx}(x) - y(x) = 0,
y(0) = 1.
A function y = f(x) is called a classical solution to this problem on (a, b) if:
1. y(x) is differentiable on (a, b).
2. The differential equation is satisfied for all values of x when the expression for y(x) and y'(x) are substituted into it.
3. The initial condition y(0) = 1 holds.
It can be shown that there is a unique classical solution to this problem for all x.
I. Verify by substitution that the function y = e^x is a classical solution to this initial value problem.