如果2x^3n = 4,则4x^9n = ()

如果2x^3n = 4,则4x^9n = () 如果(X^2n)^6=3,则(x^3n)^4= (8x^n+1-3x^n-1)-2(-x+9x^n+1-4x^n)= 先化简,再求值x^n(x^n+9x-12)-3(3x^n+1-4x^n),其中x=-3,n=2如果有人在5分钟内回答， 若A={x|x=2n,n∈N},B={x|x=3n,n∈N},C={x|x=4n-2,n∈N}则(A∪C)∩B= 若A={x|x=2n,n∈N},B={x|x=3n,n∈N},C={x|x=4n-2,n∈N}则(A∪C)∩B= (x^4n+16)(x^n-2)(x^2n+4)(x^n+2)= 已知集合P={x|x=2n,n∈N^+},集合Q={x|x=3n,n∈N*}.则P∩Q等于多少?,A,{x|x=n,n∈N*}B.{x|x=5n,n∈N*}C,{x|x=12n,n∈N*}D,{x|x=6n,n∈N*} 设n为正整数,且x^3n=4,求x^2n·x^4n+x^4n·x^5n 若x^3n=2,试求x^6n+x^4n乘以x^5n的值 x的^3n=2,求x^6n+x^4n*x^5n的值 已知x^n=2,求(3x^3n)^2-4(x^2)^2n x^2n=5 求(2x^3n)^2/4x^2n 若x^2n=4,求x^6n和(3x^3n)^2 已知x^n=4,求x^2n,x^3n的值 若x^n=2,y^n=3则1 .(xy)^3n (3x^3n)^2+4(x^2)^2n1 .(xy)^3n 2.(3x^3n)^2+4(x^2)^2n 如果正整数n使得［n/2]+[n/3]+[n/4]+[n/5]+[n/6]=69,则n= 如果正整数n使得［n/2]+[n/3]+[n/4]+[n/5]+[n/6]=69,则n=