若x的3n次方=5,y的2n次方=3,则x的6n次方*y的4n次方=-搜答案-搜搜考试网

稍等一下再问：嗯再答：解x^3m=4y^3n=5(x^m)³=4∴x^m=³√4(y^n)³=5∴y^n=³√5(x^2m)³+(y^n)³

已知三分之一xyz平方乘N=(5/3)x^(4n+1-2n-1)*y^(n+3-n+1)*z^5=(5/3)x^(2n)*y^4z^5所以N=3(5/3)*x^(2n-1)y^(4-1)*z^(5-2

解x^n=5y^n=3所以（xy)^n=15所以(xy)^2n=[(xy)^n]^2=15^2=225希望对你哟帮助学习进步O(∩_∩)O

x^(6n)+y^(4n)=[x^(3n)]^2+[y^(2n)]^2=5×5+4×4=25+16=41

方程是二元一次方程,未知数的指数=13m+5n+9=14m-2n-7=1整理,得3m+5n=-8(1)4m-2n=8(2)(1)×2+(2)×526m=24m=12/13(1)×4-(2)×326n=

是关于x、y的2元1次方程所以x和y次数都是13m+2n=1(1)-2m-3n=1(2)(1)×3+(2)×29m-4m=3+25m=5所以m=1n=(1-3m)/2=-1

由题意：5m+2n+2=63=3m-2n-1整理后：5m+2n=4.①3m-2n=4.②①+②,得：8m=8m=1则n=-1/2

5x^(3n+5)y^(3m-1)÷[-5x^(n+1)y^m]^2=x^2/55x^(3n+5)y^(3m-1)÷25x^(2n+2)y^2m=x^2/51/5*x^(3n+5-2n-2)y^(3m

(2m+1)x^2y^(n+1)是关于x,y的系数为1的5次单项式2m+1=12+(n+1)=5m=0n=2

左边括号内丢了个系数吧{2×x^5m*y^2(m-n)}³=8x^6*y^158x^(15m)*y^(6(m-n))=8x^6*y^15等式左右相应项的次数相等∴15m=6,6(m-n)=1

(XY)^2N=[(XY)^N]^2=[(X^N)(Y^N)]^2=(5x3)^2=15^2=225

X的6n次方=（X的3n次方）²=25Y的4n次方=（Y的2n次方）²=9

（x的2次y的3次）的n次=（xxyyy）的n次=x的n次乘以x的n次乘以y的n次乘以y的n次乘以y的n次=5乘以5乘以3乘以3乘以3=675

应该是这样的：=X的N次的平方*Y的N次的3次方=(5*5)*(3*3*3)=675

你要化简的应该是以下表达式吧：[(x^n)·y]·{[x^(n-1)]·(y^2)}·{[x^(n-2)]·(y^3)}·……·{(x^3)·[y^(n-2)]}·{(x^2)·[y^(n-1)]}·

x^2n=23(x^3n)^2=3(x^2n)^3=3*2^3=3*8=24

依题意：x^(15m+3n)*y(6m-3n)=x^6*y^15对比两边幂数可得：15m+3n=6……①6m-3n=15……②①+②得：21m=21∴m=1∴n=-3∴n的m次方=-3

x^2n=2y^4n=3(xy)^8n=x^8n*y^8n=(x^2n)^4*(y^4n)^2=2^4*3^2=16*9=1444^x*32^y=(2^2)^x*(2^5)^y=2^2x*2^5y=2

x^n=5,y^n=3,（x^2*y）^2n=x^4n*y^2n=(x^n)^4*(y^n)^2=5^4*3^2=5625