(x的n次方+y的n次方)(x的n次方-y的n次方)-(x的n次方+y的n次方)²
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/10 01:06:59
(x的n次方+y的n次方)(x的n次方-y的n次方)-(x的n次方+y的n次方)²
当x=2时,求代数式(1- x/3)(1+ x/3)(1+ x^2/3)(1+ x^4/81)的值
漏了,还有一题
m- 1/4(1-m)- 1/3m(2-m/4)
当x=2时,求代数式(1- x/3)(1+ x/3)(1+ x^2/3)(1+ x^4/81)的值
漏了,还有一题
m- 1/4(1-m)- 1/3m(2-m/4)
1、(x的n次方+y的n次方)(x的n次方-y的n次方)-(x的n次方+y的n次方)²
=(x^n+y^n)(x^n-y^n)-(x^n+y^n)^2
=(x^n)^2-(y^n)^2-[x^(2n)+2(x^n)*(y^n)+y^(2n)]
=x^(2n)-y^(2n)-x^(2n)-y^(2n)-2(x^n)*(y^n)
=-2y^(2n)-2(x^n)*(y^n)
2、(1- x/3)(1+ x/3)(1+ x^2/9)(1+ x^4/81)
=[1-(x/3)^2](1+x^2/9)(1+x^4/81)
=(1-x^2/9)(1+x^2/9)(1+x^4/81)
=(1-x^4/81)(1+x^4/81)
=1-x^8/2061
=1-2^8/2061
=1805/2061
3、m- 1/4(1-m)- 1/3m(2-m/4)
=m-(1/4)+(1/4)m-(2/3)m+(3/4)m^2
=(3/4)m^2-(1/4)+(5/4)m-(2/3)m
=(3/4)m^2+(7/12)m-(1/4)
=(x^n+y^n)(x^n-y^n)-(x^n+y^n)^2
=(x^n)^2-(y^n)^2-[x^(2n)+2(x^n)*(y^n)+y^(2n)]
=x^(2n)-y^(2n)-x^(2n)-y^(2n)-2(x^n)*(y^n)
=-2y^(2n)-2(x^n)*(y^n)
2、(1- x/3)(1+ x/3)(1+ x^2/9)(1+ x^4/81)
=[1-(x/3)^2](1+x^2/9)(1+x^4/81)
=(1-x^2/9)(1+x^2/9)(1+x^4/81)
=(1-x^4/81)(1+x^4/81)
=1-x^8/2061
=1-2^8/2061
=1805/2061
3、m- 1/4(1-m)- 1/3m(2-m/4)
=m-(1/4)+(1/4)m-(2/3)m+(3/4)m^2
=(3/4)m^2-(1/4)+(5/4)m-(2/3)m
=(3/4)m^2+(7/12)m-(1/4)
(x的n次方+y的n次方)(x的n次方-y的n次方)-(x的n次方+y的n次方)²
x的2n次方-y的2n次方\x的n次方+y的n次方等于
-m²n(x-y)的n次方+mn²(x-y)的n+1次方 分解因式
已知x的n次方 =5,y的n次方=3,求(xy)的2n次方
已知x的m-n的次方*x的2n+1的次方=x的11次方,且y的m-1次方*y的4-n的次方=y的5次方,(m+n)*(m
(x的n+1次方 乘 y的n-1次方)的平方 化简
2(x的2n次方乘y的6n次方)能不能再化简了
(1)若x的3n次方=4,y的3n次方=5.求(x的2n次方)的立方+(y的n次方)的立方-x的2n次方×
计算【6x的n次方y的m次方(x的平方-3xy)-(-3x的n次方y的m次方)的2次方]除以3x的n次方y的m-n次方(
初一整式计算题x 的m+n次方(3x的n次方y的n次方)除以(-2x的n次方y的n次方)
(-y²/x)的2n次方
(x-y)的2N次方-(x-y)的2n+1次方+(y-x)的2n-1次方,因式分解