I am using ShareLaTeX for assignment.

I want to input an equation like:

```
$EOQ=Q^*=\sqrt(\frac{2K\lambda}{h})$
```

and got output like this:

But I really want the square root with longer cap (or roof? I am not sure how to call it, and therefore I am not able to search the solution) like this:

Wondering how I can fix that.

## Best Answer

The

`\sqrt`

command takes as a mandatory argument what's to be extracted the square root of.So the correct syntax is

not

`\sqrt(a+b)`

. Your problem is solved by usingIf you need the cube root (or other roots), there's the optional argument:

In a previous version of your question you had

`\sqrtsign`

: this macro actually exists for historical reasons, but is not documented and should not be used in documents.