Until I saw that image, I would have assumed that notation meant 2^x. Can anyone explain what I'm missing? It would be greatly appreciated.

- Thread starter Clydey
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Until I saw that image, I would have assumed that notation meant 2^x. Can anyone explain what I'm missing? It would be greatly appreciated.

Thanks for the response. That makes more sense. I should have thought of that. Presumably the index would be inside the v portion of the radical symbol?Hello, and welcome to FMH!

What that means is \(x\) times \(\displaystyle \sqrt{2}\). Personally, I would choose to write this as:

\(\displaystyle \sqrt{2}x\)

Thanks for the insight. Much appreciated.Converting from radical to exponential form, we use:

\(\displaystyle \sqrt[n]{a^m}=a^{\frac{m}{n}}\) where \(n\in\mathbb{N}\) (this means \(n\) is a natural number, or positive integer.)

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Yes, that's where the index is shown.... Presumably the index would be inside the v portion of the radical symbol?

When a radical expression displays no index, then the index is 2. In other words, a radical symbol with no index shown means square-root.

A side note: Be careful when handwriting radicals followed by a factor, to be sure it's clear what the radicand is (i.e., the expression inside the radical sign).

Even when properly formatted in printed material, I continue to see students read \(\sqrt{2}x\) as \(\sqrt{2x}\). With such expressions, I've gotten into the habit of always including explicit multiplication notation.

\(\sqrt{2} \cdot x\;\) or \(\; \sqrt{2}\;(x) \;\) or some such.

In fact, avoiding confusion could be the very reason why that author wrote \(x\sqrt{2}\). Cheers

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You can wrap whatever you don't want to be parsed as BBCodes in PLAIN tags, for example:\sqrt[m]{x^n} wrapped in [_tex][/tex](remove the _) gives \(\displaystyle \sqrt[m]{x^n}\)

[plain][MATH]\sqrt[m]{x^n}[/MATH][/plain]

This way, you can show users exactly what to post, as it renders thusly:

[MATH]\sqrt[m]{x^n}[/MATH]

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Good example, Mark. For other members, the new no-parse feature and other helpful information can be found inYou can wrap whatever you don't want to be parsed as BBCodes in PLAIN tags ...

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Are you using [plain] and [/plain]?Hmmm... the noparse tag doesn't work here.

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Yes, that's XenForo's equivelent to vBulletin's noparse BBCode.Are you using [plain] and [/plain]?

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I thanked that post but for some reason forgot about it. I was using noparse instead of plain.Are you using [plain] and [/plain]?

-Dan

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Maybe you suffer from CRS, like I do.... for some reason forgot about it ...

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A "Career Retention Specialist?" Actually, as it happens my high school gym teacher was a real schmuck. I found out years later that he was in the Marines and was a DSI... "Drill Sergeant Instructor." He's the guy that makes the drill sergeants so nasty. I now figure we got off easy in gym class.Maybe you suffer from CRS, like I do.

Seriously though. I found a number of possibilities for CRS and none of them looked nice. Makes my PTSD seem like a toy.

-Dan