Вправи до параграфів: §.8 (1)

1. Функцію задано формулою:

1) y = 7 – x.y(0) = 7 – 0 = 7.y(4) = 7 – 4 = 3.y(S) = 7 – S.

2) y = 20x-2y(0) = 200-20 = –10.y(–3) = 20-5 = –4.y(a + 2) = 20a+2-2 = 20a

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.