@@ -58,7 +58,7 @@ First, try to evaluate by hand, then check your results by implementing the expr

## Exercise 4 (Recursion) :pencil2:

## Exercise 4 (Recursion)

To calculate the square-root of a real number $`a > 0`$ you can use the Newton-method, by getting the root (zero-point) of the function $`f(x)`$,

defined by:

```math

...

...

@@ -89,8 +89,6 @@ Try your code with a recursion depth of $`N=5, 10, 100`$ for $`a=10`$ and initia

How to check the error you have made? How to choose the initial value `x0` and the iteration count `N`? How would you design your implementation

`double sqrt(double a)` of a square-root function and which version of the implementation above would you choose?

**>> Submit solution until 2019/11/13 ... (10 Points)**

### Notes and additional questions:

- You can use the `std::sqrt` function from `<cmath>` as a comparison.

- (optional) Measure the time of your implementation and compare it against the time of the `std::sqrt` implementation. Therefore, either use the `Timer`