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ptnphuoc.65cva2122
2 năm trước
Bài 1: Cho đa thức f(x) = – 3x^2 + x – 1 + x^4 – x^3– x^2 + 3x^4 g(x) = x^4 + x^2– x^3 + x – 5 + 5x^3 –x^2 a) Thu gọn và sắp xếp các đa thức trên theo luỹ thừa giảm dần của biến. b) Tính: f(x) – g(x); f(x) + g(x) c) Tính g(x) tại x = –1. Bài 2: Cho P(x) = 5x -1/2 a) Tính P(-1) và P(-3/10) b) Tìm nghiệm của đa thức P(x).
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