1、计算下式的值:[(1^4+¼)(3^4+¼)……(19^4+¼)]÷[(2^4+¼)(4^4+¼)……(20^4+¼)]2、已知乘法公式:a^5+b^5≈(a+b)(a^4-a^3b+a^2b^2-ab^3+b^4
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 17:22:46
![1、计算下式的值:[(1^4+¼)(3^4+¼)……(19^4+¼)]÷[(2^4+¼)(4^4+¼)……(20^4+¼)]2、已知乘法公式:a^5+b^5≈(a+b)(a^4-a^3b+a^2b^2-ab^3+b^4](/uploads/image/z/1719146-2-6.jpg?t=1%E3%80%81%E8%AE%A1%E7%AE%97%E4%B8%8B%E5%BC%8F%E7%9A%84%E5%80%BC%EF%BC%9A%5B%EF%BC%881%5E4%EF%BC%8B%26frac14%3B%EF%BC%89%EF%BC%883%5E4%EF%BC%8B%26frac14%3B%EF%BC%89%E2%80%A6%E2%80%A6%EF%BC%8819%5E4%EF%BC%8B%26frac14%3B%EF%BC%89%5D%C3%B7%5B%EF%BC%882%5E4%EF%BC%8B%26frac14%3B%EF%BC%89%EF%BC%884%5E4%EF%BC%8B%26frac14%3B%EF%BC%89%E2%80%A6%E2%80%A6%EF%BC%8820%5E4%EF%BC%8B%26frac14%3B%EF%BC%89%5D2%E3%80%81%E5%B7%B2%E7%9F%A5%E4%B9%98%E6%B3%95%E5%85%AC%E5%BC%8F%EF%BC%9Aa%5E5%EF%BC%8Bb%5E5%E2%89%88%EF%BC%88a%EF%BC%8Bb%EF%BC%89%EF%BC%88a%5E4%EF%BC%8Da%5E3b%EF%BC%8Ba%5E2b%5E2%EF%BC%8Dab%5E3%EF%BC%8Bb%5E4)
1、计算下式的值:[(1^4+¼)(3^4+¼)……(19^4+¼)]÷[(2^4+¼)(4^4+¼)……(20^4+¼)]2、已知乘法公式:a^5+b^5≈(a+b)(a^4-a^3b+a^2b^2-ab^3+b^4
1、计算下式的值:
[(1^4+¼)(3^4+¼)……(19^4+¼)]÷[(2^4+¼)(4^4+¼)……(20^4+¼)]
2、已知乘法公式:a^5+b^5≈(a+b)(a^4-a^3b+a^2b^2-ab^3+b^4)
a^5-b^5≈(a-b)(a^4+a^3b+a^2b^2+ab^3+b^4)
利用或者不利用上述公式,将x^8+x^6+x^4+x^2+1分解因式.
两个公式的约等号应该为等号,打错了。
无人问津?答对一个也行。
1、计算下式的值:[(1^4+¼)(3^4+¼)……(19^4+¼)]÷[(2^4+¼)(4^4+¼)……(20^4+¼)]2、已知乘法公式:a^5+b^5≈(a+b)(a^4-a^3b+a^2b^2-ab^3+b^4
(2)(x^8+x^6+x^4+x^2+1)
=(x^2-1)(x^8+x^6+x^4+x^2+1)/(x^2-1)
=(x^10-1)/(x^2-1)
=(x^5+1)(x^5-1)/(x^2-1)
=(x+1)(x^4+x^3-x+1)(x-1)(x^4+x^3+x^2+x+1)/(x^2-1)
=(x^4+x^3-x+1)(x^4+x^3+x^2+x+1)
呆比帮你。