Today my mum and I went to the supermarket. We bought a loaf of white bread in the <span>bakery department. In the dairy we bought cottage cheese and milk. We also bought a woolen blanket and a cotton towel. These were sold at a discount. We spent about 5000 roubles in total.</span>
2x-5=-1 при х=2
Находим
f (-1) = f (2·2-5) = 22-3·2+5=3
или так:
замена переменной
2 х-5=t ⇒ x = (t+5) / 2
f (t) = ((t+5) 2/4) - 3· ((t+5) / 2) + 5
f (t) = (t2+4t+15) / 4
f (-1) = (1-4+15) / 4=3
Драма, музыка, Новости, спорт, шоу, peality Наука фантастика, ток-шоу
1)...is she?
2)...are they?
3)...was he?
4)...could I?
5)...will they?
6)...had she?