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vutiensonha
2 năm trước
cho 2 đa thức f(x)= x² + 3x³ - 9x^5 - 7 - 5x^7 + 2x³ +3x²+ x^5 - 4x²+3x^7 g(x)= 2x^5 + 2x³ -7x^8 - 2x^7 + x³ + 5x² - 5x^7 + 1/2 -x^4 -3x² - x^6 a) tính f(x) +g(x) ; f(x)-g(x) ; g(x) - f(x) b) chứng tỏ rằng x=0 là 1 nghiệm của đa thức của g(c) nhưng ko phải là 1 nghiệm của đa thức f(x)
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