This is the 12221st most frequent Russian word.
интеллекту
The Russian word "интеллекту" is a dative form of "интеллект," meaning "to intellect" or "to intelligence."
Here, 'интеллекту' is in dative case and refers to the concept of intellect or intelligence, indicating that the book addresses this topic.
Моя книга посвящена развитию интеллекту.
My book is devoted to the development of intellect.
In this sentence, 'интеллекту' is in dative case again and refers to the intellect (mental capacities or intelligence) focusing on the intellectual development in children.
Мы должны уделять много внимания интеллекту наших детей.
We must pay a lot of attention to the intellect of our children.
Here, 'интеллектом' is in instrumental case and describes the type of intellect (artificial in this case) as a characteristic of the machine.