(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

On MikTeX, can't enter $\mathbb{R}$

Gives me a statement that says

No idea what that means?Code (Text):! Undefined control sequence.

<recently read> \mathbb

l.14 $\mathbb

{F}$

?

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# Homework Help: \mathbb{stuff} isn't working

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