Final answer:
The solution to the differential equation is f(x) = 4x + C. The magnitude of the error in the Euler approximations can be found by calculating the absolute difference between the exact solution and the approximations.
Step-by-step explanation:
To find the solution to the given differential equation, we need to start with a function that has a derivative of 4. Let's call this function f(x). So, the derivative of f(x) will be 4. One such function is f(x) = 4x + C, where C is a constant. This function satisfies the condition that its derivative is 4, so it is the solution to the differential equation.
The magnitude of the error in the two Euler approximations can be found by calculating the absolute difference between the exact solution and the approximations at the same point. Let's say the exact solution is denoted by y(x) and the Euler approximations are denoted by y_1(x) and y_2(x) (with 2 steps), then the magnitude of the error in the Euler approximations is |y(x) - y_1(x)| and |y(x) - y_2(x)| respectively.