Question

What is" J' ai un livre" in negation?​

Answer 1

J' ai d' un livre is your answer

une become de or d' (in front of a vowel or mute h) after a negative expression (ne...pas / ne...jamais / ne...plus ... etc.) in order to express no / any.

Answer 2

Answer:

Je ne ai pas un livre.

Translation- I don't have a book.

Hope this helps!