Write a Function in F# please and Thankyou.

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Write a Function in F# please and Thankyou.

**Exercise #05: pairwise L1 L2**

---

**Objective:**

The task is to write a function named `pairwise` that takes two lists, `L1` and `L2`. Both lists must have the same length. The function should combine the corresponding elements from each list into pairs and return a list of these pairs.

**Example:**

For input lists:
- `L1 = [1; 3; 5; 7]`
- `L2 = [10; 20; 30; 40]`

The function should produce the output:
- `[(1,10); (3,20); (5,30); (7,40)]`

**Instructions:**

- You may solve the problem by using recursion, employing higher-order functions, or both.
- Tail recursion is not a necessary requirement for this exercise.

**Starting Template:**

```ocaml
let rec pairwise L1 L2 =
  []
```

---

**Note:** The exercise illustrates how to merge two lists by using functional programming techniques, emphasizing various approaches like recursion or higher-order functions.
Transcribed Image Text:**Exercise #05: pairwise L1 L2** --- **Objective:** The task is to write a function named `pairwise` that takes two lists, `L1` and `L2`. Both lists must have the same length. The function should combine the corresponding elements from each list into pairs and return a list of these pairs. **Example:** For input lists: - `L1 = [1; 3; 5; 7]` - `L2 = [10; 20; 30; 40]` The function should produce the output: - `[(1,10); (3,20); (5,30); (7,40)]` **Instructions:** - You may solve the problem by using recursion, employing higher-order functions, or both. - Tail recursion is not a necessary requirement for this exercise. **Starting Template:** ```ocaml let rec pairwise L1 L2 = [] ``` --- **Note:** The exercise illustrates how to merge two lists by using functional programming techniques, emphasizing various approaches like recursion or higher-order functions.
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