### sumPower

Returns the sum of the powers of all the numbers from `start` to `end` (both inclusive).

Use `Array.fill()` to create an array of all the numbers in the target range, `Array.map()` and the exponent operator (`**`) to raise them to `power` and `Array.reduce()` to add them together.
Omit the second argument, `power`, to use a default power of `2`.
Omit the third argument, `start`, to use a default starting value of `1`.

```js
const sumPower = (end,power = 2,start = 1) =>
  Array(end + 1 - start).fill(0).map((x,i) => (i+start) ** power).reduce((a,b) => a+b,0)
```

```js
sumPower(10); // 385
sumPower(10,3); //3025
sumPower(10,3,5); //2925
```