Доказать неравенство
[tex]a^{4}+b^{4} \geq a^{3}b+b^{3}a[/tex]
при [tex]a \geq 0, b \geq 0[/tex]

описание листа калины?

. Поставьте вопросы к выделенным словам.

1. It will take you two hours to get there. (1)2. I'm not going to the cinema, because I'm very busy tonight. (1) 3. We're going to have our examination at the end of June. (1) 4. His wife's health is still poor. (1)5. He can't write to you now, because hе

 hasn 't got the time. (1)