сербского

сербского

"Serbian."

In this sentence, 'сербского' is used as the genitive case of the adjective 'сербский', describing the language (языка) being studied.

Я изучаю сербского языка.

I am studying the Serbian language.

Here, 'сербского' is in the genitive case, agreeing with 'писателя' (writer) to indicate possession or origin.

Это книга сербского писателя.

This is a book by a Serbian writer.

In this example, 'сербского' is an adjective in the genitive case, associated with 'искусства' (art), denoting the origin of the art.

На выставке было представлено множество произведений сербского искусства.

At the exhibition, many works of Serbian art were displayed.