2. Hitung nilai P(1) jika P(x) = 2x^3 – x^2 + 4x + 1.
Jawab:
P(1) = 2(1)^3 – (1)^2 + 4(1) + 1 = 2(1) – 1 + 4 + 1 = 2 – 1 + 4 + 1 = 6
3. Diketahui P(x) = x^4 – 3x^3 + 5x^2 – 2x + 7, hitung nilai P(3).
Jawab:
P(3) = (3)^4 – 3(3)^3 + 5(3)^2 – 2(3) + 7 = 81 – 81 + 45 – 6 + 7 = 46
4. Jika P(x) = 4x^3 – 2x^2 + x – 3, tentukan nilai P(-2).
Jawab:
P(-2) = 4(-2)^3 – 2(-2)^2 + (-2) – 3 = 4(-8) – 2(4) – 2 – 3 = -32 – 8 – 2 – 3 = -45