Which of the following CANNOT be a root of a polynomial in x of the form 9x^5+ax^3+b,where a and b are integers?
Which of the following CANNOT be a root of a polynomial in x of the form 9x^5+ax^3+b,where a and b are integers?
(a)-9 (b) -5 (c)1/4 (d)1/3 (e)9
(a)-9 (b) -5 (c)1/4 (d)1/3 (e)9
數學人氣：891 ℃時間：2019-11-07 16:06:52
優(yōu)質解答
把root代入原公式會得到0,所以如果9(-9)^5+a(-9)^3+b9(-5)^5+a(-5)^3+b9(1/4)^5+a(1/4)^3+b9(1/3)^5+a(1/3)^3+b9(9)^5+a(9)^3+b當中的一個式子結果不是0的話,那么這個數字就不是這個polynomial的root.注意因為a和b是...
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