M=[a,b,3],N=[2,b²,3]且M=N,求实数a,b的值
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![M=[a,b,3],N=[2,b²,3]且M=N,求实数a,b的值](/uploads/image/f/680527-55-7.jpg?t=M%3D%5Ba%2Cb%2C3%5D%2CN%3D%5B2%2Cb%C2%B2%2C3%5D%E4%B8%94M%3DN%2C%E6%B1%82%E5%AE%9E%E6%95%B0a%2Cb%E7%9A%84%E5%80%BC)
根号(11开立方根-根号2)或-根号(11开立方根-根号2)首先根据A=根号n-m+3的m-n次方是n-m+3的算术平方根可以知道m-n=1然后根据B=根号m+2n的m-2n+3次方是m+2n的立方根
易得m=4,n=2所以b-a=-1所以b-a的立方根为-1
m-n=2m-2n+3=3m=4n=2n-m+3=1m+2n=8A=1,B=2B-A=1
由已知的{m-n=2m-2n=3}解得{m=1n=-1}∴A=根号下1+(-1)+3=根号下3B=立方根下1+2*(-1)=-1∴B-A=-1-根号下3根号不会打,还有*是乘号……希望采纳……嘻嘻……
1.a^3m+b^2n=(a^m)^3+(b^n)^2=3^3+4^2=432.(3x^3n)^2-4(x^2)^2n=9x^6n-4x^4n=3087-196=2891
解a^m=2b^n=3∴a^3m×b^2n=(a^m)³×(b^n)²=2³×3²=72
A=m-n次根号下m+n+3是m+n+3的算术平方根,B=m-2n+3次根号下m+2n是m+2n的立方根∴m-n=2m-2n+3=3解得m=4,n=2∴A=√﹙M+N+3)=3B=2B-A的立方根=-
A=m-n根号n-m+3是n-m+3的算术平方根,这里的开方数是m-n,被开方数是n-m+3,是开算术平方根,所以m-n=2B=m-2n+3根号m+2n是m+2n的立方根,这里的开方数是m-2n+3,
(a^2m)^3+(b^n)^3-a^2m×b^n×a^4m×b^2n=a^6m+b^3n-a^6m×b^3n=(a^3m)^2+b^3n-(a^3m)^2×b^3n=3^2+2-3^2×2=-7
a^3m=3则a^2m=9的立方根b^3n=2b^n=2的立方根(a^2m)^3+(b^n)^3-a^2mb^n=a^6m+b^3n-a^2mb^n=(a^3m)^2+b^3n-a^2mb^n=9+2
方程整理得,a^m+2nb^2m+n+2=a^5b^3,则有,m+2n=5;2m+n+2=3;解得m=-1,n=3,故,m-3n=-1-9=-10
答:打错了吧?那个n是m吧?m^3-m^2-20m=m(m^2-m-20)=m(m-5)(m+4)应该是卷子打错了,真的要分的话,就上那位朋友那样分了,而且根号里面的m还可以提出来,根号里面再分,这样
(a^m+1b^n+2)(a^2n-1b^2m)=a^5b^3,求m-3n的值(a^m+1b^n+2)(a^2n-1b^2m)=a^5b^3a^(m+1+2n-1)b^(n+2+2m)=a^5b^3∴
m-n=2m-2n=3所以m=1n=-1所以A=根号下3B=三次根号下-1所以B-A=-1-根号下3
(a^2m)^3+(b^n)^3-a^2m×b^n×a^4m×b^2n=a^6m+b^3n-a^6m*b^3n=(a^3m)^2+b^3n-(a^3m)^2*b^3n=9+2-9*2-7
2^(3m+10n)=2^3m×2^10n=(2^m)³×[(2^5)^n]²=(2^m)³×(32^n)²=a³×b²=a³b&
TheresultofthisquestionisthatB-A=1
A=m+n+3开m-n次方是m+n+3的算术平方根m-n=2B=m+2n开m-2n次方是m+2n的立方根m-2n=3m=1n=-1B-A=-1-根号2
(a^2m)^3+(b^n)^3-a^2m×b^n×a^4m×b^2n=a^6m+b^3n-a^6m×b^3n=(a^3m)^2+b^3n-(a^3m^2×b^3n)=3^2+2-(3^2×2)=9+