Questions & Answers about В этом тексте не хватает точки.
Because в этом тексте means in this text, expressing location.
After в, Russian uses:
- accusative for motion into something: в этот текст = into this text
- prepositional for location: в этом тексте = in this text
Here we are talking about something being missing in the text, not moving into it, so the prepositional case is required.
Тексте is the prepositional singular form of текст.
The noun текст is masculine, and after в when it means location, it normally goes into the prepositional:
- текст → в тексте
The adjective/pronoun changes too:
- этот текст
- в этом тексте
So both words are in the prepositional case and agree with each other.