x的3m 1次方×x 3x的n+1
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解题思路:利用幂的计算求解。解题过程:varSWOC={};SWOC.tip=false;try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/rea
传图好辛苦,如果可以我真想把纸直接给你得了.
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
x的n次方乘x的n+1次方+x的n+1次方乘x的n-2的次方+(-x)的3次方乘(-x)的2n-4次方=x^(2n+1)+x^(2n-1)-x((2n-1)=x^(2n+1)-2x^(2n-1)
(X的n次方)²=9,即:X的2n次方=9(1/3X的3n次方)²-3(X²)的2n次方=(1/3)²(X的2n次方)³-3(X的2n次方)²
分别用3x和3y去代换原分式中的x和y,得2(3x)3(3x)-2(3y)=6x9x-6y=3(2x)3(3x-2y)=2x3x-2y,可见新分式与原分式相等.故选B.
3X*(X的n次方+5)=3X的n+1次方+453X的n+1次方+15x=3X的n+1次方+4515x=45x=3
x^(3n+1)*x+3x^(n+1)*x^(2n+1)=x^(3n+2)+3x^(n+1+2n+1)=x^(3n+2)+3x^(3n+2)=4x^(3n+2)
x^3n*x+3x^(n+1)*x^(2n+1)=x^(3n+1)+3*x^(2n+2)=x^(3n+1)*(1+3x)再问:问题补充!!!再答:x^(3n+1)*x+3x^(n+1)*x^(2n+1
(x的2n次方)的立方+(y的n次方)的立方-x的2n次方×y的n次方×x的4n次方×y的2n次方=(x的3n次方)的平方+y的3n次方-x的6n次方xy的3n次方=(x的3n次方)的平方+y的3n次
x的n+3次方-x的n-1次方=x^(n+3)-x^(n-1)=x^(n-1)(x^4-1)=x^(n-1)(x^2-1)(x^2+1)=x^(n-1)(x-1)(x+1)(x^2+1)
去分母得,3ax-3(x+1)=2x,即(3a-5)x=3由3a-5≠0,解得:x=33a−5,检验:当x=33a−5时,3x+3=3(x+1)=3(3a−2)3a−5,∵3a-2≠0,∴3x+3≠0
原式=-x^(3+2n-1)-x^(2n+2)=-x^(2n+2)-x^(2n+2)=-2x^(2n+2)
(-x)^3*x^(n-1)+x^2n*(-x)^2=-x^3*x^(n-1)+x^2n*x^2=-x^(3+n-1)+x^(2n+2)=-x^(n+2)+x^(2n+2)=-x^(n+2)+x^n*
因为x的m-1次方+1>0,3x的2n次方-2x
分两种情况:1.n为奇数时a(x-y)的n次方-3b(y-x)的n+1次方+2c(y-x)的n+2=a(x-y)^n-3b(x-y)^(n+1)-2c(x-y)^(n+2)=(x-y)^n*[a-3b
∵x的3n次方-x的2n次方+1=0∴x的3n次方=x的2n次方-1∴x的5n次方+x的n次方+2013=x的3n次方*x的2n次方+x的n次方+2013=(x的2n次方-1)*x的2n次方+x的n次
=x的(n-2)次方(x²+3x-1)再问:步骤再答:就是提取公因式=x的(n-2)次方×x²+x的(n-2)次方×3x-x的(n-2)次方×1=x的(n-2)次方(x²
3x^(2n-1)-12x^(2n+1)=3x^(2n-1)(1-4x^2)=3x^(2n-1)(1+2x)(1-2x)