доказать что для любого числа t выполняется неравенство t^4-t+1/2>0

Ex: The mother of these children – these children's mother.

1. The house of this designer is ultramodern. 2. The atmosphere of Venice is magic. 3. The nature of Iceland is almost untouched. 4. The presidents of these countries signed an important agreement. 5. The project of this student took the first place. 6. The waiters of this restaurant are very polite. 7. The farmers of Altai region gathered much wheat this year. 8. The sand statue of this sculptor won the main prize. 9. The play of this actor leaves much to be desired. 10. The best stars of Hollywood will participate in this film. 11. The name of the coffee that we drank was Grand. 12. The cousin of my nephew is married to the sister of my friend/