问几道数学题(要有过程)1.已知a,b均为正数,且a≠b,那么a^5+b^5与a^4×b+ab^4那个大?2.甲、乙两同学同时分解因式x^2+mx+n,甲看错了n,分解结果为(x+1)(x+4);乙看错了m,分解结果为(x+1)(x+9)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/28 23:26:30
![问几道数学题(要有过程)1.已知a,b均为正数,且a≠b,那么a^5+b^5与a^4×b+ab^4那个大?2.甲、乙两同学同时分解因式x^2+mx+n,甲看错了n,分解结果为(x+1)(x+4);乙看错了m,分解结果为(x+1)(x+9)](/uploads/image/z/1031204-20-4.jpg?t=%E9%97%AE%E5%87%A0%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E8%A6%81%E6%9C%89%E8%BF%87%E7%A8%8B%EF%BC%891.%E5%B7%B2%E7%9F%A5a%2Cb%E5%9D%87%E4%B8%BA%E6%AD%A3%E6%95%B0%2C%E4%B8%94a%E2%89%A0b%2C%E9%82%A3%E4%B9%88a%5E5%2Bb%5E5%E4%B8%8Ea%5E4%C3%97b%2Bab%5E4%E9%82%A3%E4%B8%AA%E5%A4%A7%3F2.%E7%94%B2%E3%80%81%E4%B9%99%E4%B8%A4%E5%90%8C%E5%AD%A6%E5%90%8C%E6%97%B6%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8Fx%5E2%2Bmx%2Bn%2C%E7%94%B2%E7%9C%8B%E9%94%99%E4%BA%86n%2C%E5%88%86%E8%A7%A3%E7%BB%93%E6%9E%9C%E4%B8%BA%EF%BC%88x%2B1%EF%BC%89%EF%BC%88x%2B4%EF%BC%89%EF%BC%9B%E4%B9%99%E7%9C%8B%E9%94%99%E4%BA%86m%2C%E5%88%86%E8%A7%A3%E7%BB%93%E6%9E%9C%E4%B8%BA%EF%BC%88x%2B1%EF%BC%89%EF%BC%88x%2B9%EF%BC%89)
xRMO@+$-MvTz"_ ((PXv[z/8]Q1ƃ/7oޛ]!Cn[Q#uU[hy/n4y[hYGfuuf: gu^mZ> iҎbao_9<~i]Wqp ɤivH<VY>Kb>&
i4ӠA>(_[g' G6ώIL# IIvh^"eXѣ7j8@ +wEȍ]pwb7r4uB
U*[N` K+䥤F%I'Xl) ^~;M"
˅ /Ѱ}Ǧ~y!d1\h+(҆mP+x#HLM
问几道数学题(要有过程)1.已知a,b均为正数,且a≠b,那么a^5+b^5与a^4×b+ab^4那个大?2.甲、乙两同学同时分解因式x^2+mx+n,甲看错了n,分解结果为(x+1)(x+4);乙看错了m,分解结果为(x+1)(x+9)
问几道数学题(要有过程)
1.已知a,b均为正数,且a≠b,那么a^5+b^5与a^4×b+ab^4那个大?
2.甲、乙两同学同时分解因式x^2+mx+n,甲看错了n,分解结果为(x+1)(x+4);乙看错了m,分解结果为(x+1)(x+9).求m、n的值并写出正确的分解过程.
Sorry,是甲看错了n,分解结果为(x+2)(x+4);
问几道数学题(要有过程)1.已知a,b均为正数,且a≠b,那么a^5+b^5与a^4×b+ab^4那个大?2.甲、乙两同学同时分解因式x^2+mx+n,甲看错了n,分解结果为(x+1)(x+4);乙看错了m,分解结果为(x+1)(x+9)
1 a^5+b^5-a^4×b+ab^4=a^4(a-b)+b^4(b-a)=(a-b)(a^4-b^4)=(a-b)^2*(a+b)*(a^2+b^2)>0
故前者大于后者
2 对于甲 (x+2)(x+4)=x^2+6x+8.m=6
对于已 (x+1)(x+9)=x^2+10x+9.n=9
故原式为x^2+6x+9=(x+3)^2