作业帮已知2m-n=3,4m+3n=1,求5n(2m-n)^2-2(n-2m)^3的值式子
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 07:38:43
已知2m-n=3,4m+3n=1,求5n(2m-n)^2-2(n-2m)^3的值式子
已知2m-n=3,4m+3n=1,求5n(2m-n)^2-2(n-2m)^3的值
式子
已知2m-n=3,4m+3n=1,求5n(2m-n)^2-2(n-2m)^3的值式子
x^2m=3 => x^m = 3^(1/2)
y^3n=2 => y^n=2^(1/3)
(x^3m)^2+(y^n)^3-x^my^4nx^3my^5n
=x^6m + y^3n - x^my^4nx^3my^5n
= (x^m)^6 + (y^n)^3 - (x^m)(y^n)^4 * (x^m)^3 * (y^n)^5
= [3^(1/2)]^6 + [2^(1/3)]^3 - 3^(1/2)* [2^(1/3)]^4 * [3^(1/2)]^3 * [2^(1/3)]^5
=3^3 + 3 - 3^(1/2)* [2^(4/3)] * [3^(3/2)] * [2^(5/3)]
= 9 + 3 - 3^2 * 2^3
= 9+ 3-6*6
= -24
2m-n=3 (1)
4m+3n=1 （2）
（1）*2-（2）可解得n=-1
则所求=5*（-1）*（3)^2-2*（-3)^3=9
=5n(2m-n)²+2(2m-n)³ =(2m-n)²(5n+4m-2n) =(2m-n)²(4m+3n) =3²*1 =9
已知m/n=5、,求（m/（m+n）)+(m/(m-n))-(n^2/(m^3-n^2))
已知m/n=5/3 求(1/m+n+1/m-n)÷1/n-n/m-n÷m+n/n的值,今天就要
已知：m/n=5/3,求（1/m+n+1/m-n)÷1/n-n/m-n÷m+n/n的值
已知2m-n=3,4m+3n=1,求5n(2m-n)^2-2(n-2m)^3的值式子
已知2m-n=3,4m+3n=1,求5n(2m-n)^2-2(n-2m)^3的值
已知2m-n=3,4m+3n=1,求5n(2m-n)²-2(n-2m)³的值
已知m/n=5/3,求m/(m+n)+m/(m-n)-n平方/(m平方-n平方)
已知n/m=3/5,求m+n/m
已知m-2n/2m+n=5,求代数式3(m-2n)/2m+n－15(2m+n)/m-2n－2
已知m=5 4/7,n=4 3/7, 求代数式[-7/2(m+n)]^3×(m-n)×[-2(m+n)(m-n)]^2的值
已知(4M-5N+17)*(4M-5N+17)+(7M-3N+1)*(7M-3N+1)=0,求M,N的值
已知m=1/3,n=1/27,求m-n/根号m-根号n+(m+4n-4根号mn)/根号m-2根号n
已知2^m=4^n+1,27^n=3^m+1.求m+n+5的平方根
已知:n分之m=3分之5,求(m+n分之m) + (m-n分之m) - (m方-n方,分之n方) 我要详解=[2(m/n)^2-1]/[(m/n)^2-1]
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
已知|m-2|+(n+1/5)^2=0,求m-(m^2n+3m-4N)+3(2nm^2-3n)的值
(m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1
已知|m-2|+(n+1/5 )²=0,求m-(m²n+3m-4n)+3(2nm²-3n)的值