1-x的2n次方 1 x的2n次方函数表达式

x^(m-n)*x^(2n+1)=x^11.(m-n)+(2n+1)=11.m+n=10y^(m-1)*y^(4-n)=y^5.(m-1)+(4-n)=5.m-n=2(m+n)(m-n)=20m=6n

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

[x^(2n)-y^(2n)]/[x^(n)+y^(n)]=(x^n-y^n)*(x^n+y^n)/(x^n+y^n)=x^n-y^n

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的n次方（a-1）的2n次方/x的2n次方（a-1）的n+1次方=x^n（a-1）^2n/x^2n（a-1）^(n+1)=(a-1)^(n-1)/x^n

用数学归纳法即可证明

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

a²x^(n-2)-abx^(n-1)+acxⁿ-adx^(n-1)=ax^(n-2)(a-bx+cx²-dx)=ax^(n-2)[cx²-(b+d)x+a]

x^(n-m)*x^(2n+1)=x^11==>(n-m)+(2n+1)=11(1)y^(m-1)*y^(4-n)=y^5==>(m-1)+(4-n)=5(2)由（1）、（2）式解方程组得m=8,n=

x的n+1次方-1即x^(n+1)-1[x^n+x^(n-1)+...+x+1](x-1)=[x^n+x^(n-1)+...+x+1]x-[x^n+x^(n-1)+...+x+1]=[x^(n+1)+

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*

可以用等比公式啊公比q=x利用公式Sn=a1(1-q^n)/(1-q)x的1次方+x的2次方+.+x的n次方=x(1-x^n)/(1-x)同时,注意,当x=1时,x的1次方+x的2次方+.+x的n次方

2x^n-6x^(n-1)-8x^(n-2)=2x^(n-2)(x^2-3x-4)=2x^(n-2)(x-4)(x+1)

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)