搜狗做题网x的3次方 x的2n-1次方
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 06:17:13
x^3n=2x^6n+x^2n*x^10n=x^(2*3n)+x^(2n+10n)=(x^3n)^2+x^12n=(x^3n)^2+x^(4*3n)=(x^3n)^2+(x^3n)^4=2^2+2^4
x^3y^(m-1)x^(n+m)y^(2n+2)=x^(3+n+m)y^(m-1+2n+2)=x^(m+n+3)y^(m+2n+1)=x^9y^9m+n+3=9m+2n+1=9解得m=4n=24m-
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
多项式中-1/3x的5次方+（m+1）x的4次方+2x的1次方-（n-2）x的2次方中不含x的偶次方项,=-1/3x^5+（m+1）x^4+2x-（n-2）x^2m+1=0n-2=0m=-1n=2m的
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
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)]}·
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
因为x的m-1次方+1>0,3x的2n次方-2x
x^(6n)+x^(4n)*x^(5n)=x^(6n)+x^(9n)=[x^(3n)]^2+[x^(3n)]^3=2^2+2^3=4+8=12
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
3x^(2n-1)-12x^(2n+1)=3x^(2n-1)(1-4x^2)=3x^(2n-1)(1+2x)(1-2x)
x^3n=2那么x^6n+x^2n*x^10n=(x^3n)²+x^12n=4+(x^3n)^4=4+2^4=4+16=20
=3(x的n次方+2)(x的n次方-2)/x³(x的n次方+3)²×(x的n次方+3)/(x的n次方-2)×1/x(x的n次方+3)=3(x的n次方+2)/x³(x的n次