Відповіді §.7 - §.8 » §.8 (1)

Функцію задано формулою: 1) y = 7 – x. y(0) = 7 – 0 = 7. y(4) = 7 – 4 = 3. y(S) = 7 – S. 2) y = 20/(x-2) y(0) = 20/(0-20) = –10. y(–3) = 20/(-5) = –4. y(a + 2) = 20/(a+2-2) = 20/a 3) y = 10 – √(x+64). y(0) = 10 – √(0+64) = 10 – 8 = 2. y(36) = 10 – √(36+64) = 0. y(a – 64) = 10 – √(a-64+64) = 10 – √a. 4) y = –3x2 – x + 8. y(0) = 8. y(–2) = –3 • 4 + 2 + 8 = –2. y(n – 1) = –3(n2 – 2n + 1) – n + 1 + 8 = –3n2 + 5n + 6.