Question

Ex 19. Va rog ajutati-ma!! Dau coroana!! ​

Answer 1

Răspuns:

2 l 2x0 ⇒ x∈{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

3 l 35y ⇒ 3 l (3+5+y) ⇒ y∈{1, 4, 7}

x≠y

$\frac{2x0}{35y}$ ∈ {$\frac{200}{351}, \frac{220}{351}, \frac{230}{351}, \frac{240}{351}, \frac{250}{351}, \frac{260}{351}, \frac{270}{351}, \frac{280}{351}, \frac{290}{351}, \\\frac{200}{354}, \frac{210}{354}, \frac{220}{354}, \frac{230}{354}, \frac{250}{354}, \frac{260}{354}, \frac{270}{354}, \frac{280}{354}, \frac{290}{354}, \\ \frac{200}{357}, \frac{210}{357}, \frac{220}{357}, \frac{230}{357}, \frac{240}{357}, \frac{250}{357}, \frac{260}{357}, \frac{280}{357}, \frac{290}{357}$}

Explicație pas cu pas: