快,谢)a+2/a^2-4=1/()3a/5xy=()/10axy计算;3/x-2/5y9m^2/-3m-n+n^2/n
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/12 22:58:29
快,谢)
a+2/a^2-4=1/()
3a/5xy=()/10axy
计算;
3/x-2/5y
9m^2/-3m-n+n^2/n+3m
a^2/a-b-a-b
(xy-y^2)÷x-y/xy
解方程;
1/x+1=2/x-1
2x/2x+5+5/5x-2=1
1/x-2+3=x-1/x-2
a+2/a^2-4=1/()
3a/5xy=()/10axy
计算;
3/x-2/5y
9m^2/-3m-n+n^2/n+3m
a^2/a-b-a-b
(xy-y^2)÷x-y/xy
解方程;
1/x+1=2/x-1
2x/2x+5+5/5x-2=1
1/x-2+3=x-1/x-2
a+2/a^2-4=1/(a-2)
3a/5xy=(6a^2)/10axy
计算;
3/x-2/5y=(15y-2x)/5xy
9m^2/-3m-n+n^2/n+3m
a^2/a-b-a-b=[a^2-(a-b)(a+b)]/(a-b)=(a^2-a^2+b^2)/(a-b)=b^2/(a-b)
(xy-y^2)÷x-y/xy
=[y(x-y)]*[xy/(x-y)]
=xy^2
解方程;
1/x+1=2/x-1
两边乘(x+1)(x-1)
1*(x-1)=2(x+1)
x-1=2x+2
x=-3
经检验,x=-3是方程的解
2x/2x+5+5/5x-2=1
两边乘(2x+5)(5x-2)
2x(5x-2)+5(2x+5)=(2x+5)(5x-2)
10x^2-4x+10x+25=10x^2+21x-10
15x=35
x=7/3
经检验,x=7/3是方程的解
1/x-2+3=x-1/x-2
两边乘x-2
1-3(x-2)=x-1
1-3x+3=x-1
4x=5
x=5/4
经检验,x=5/4是方程的解
3a/5xy=(6a^2)/10axy
计算;
3/x-2/5y=(15y-2x)/5xy
9m^2/-3m-n+n^2/n+3m
a^2/a-b-a-b=[a^2-(a-b)(a+b)]/(a-b)=(a^2-a^2+b^2)/(a-b)=b^2/(a-b)
(xy-y^2)÷x-y/xy
=[y(x-y)]*[xy/(x-y)]
=xy^2
解方程;
1/x+1=2/x-1
两边乘(x+1)(x-1)
1*(x-1)=2(x+1)
x-1=2x+2
x=-3
经检验,x=-3是方程的解
2x/2x+5+5/5x-2=1
两边乘(2x+5)(5x-2)
2x(5x-2)+5(2x+5)=(2x+5)(5x-2)
10x^2-4x+10x+25=10x^2+21x-10
15x=35
x=7/3
经检验,x=7/3是方程的解
1/x-2+3=x-1/x-2
两边乘x-2
1-3(x-2)=x-1
1-3x+3=x-1
4x=5
x=5/4
经检验,x=5/4是方程的解
计算:(a^m)^n*(-a^3n)^2m除以(a^nm)^5-a^2nm
(3a^n-2)-6a^n+14a^n-1(因式分解) (m-n)^3+4(n-m)
已知a^m=2,a^n=3,求a^2m+3n的值; 已知a^2n+1=5,求a^6n+3的值 ;已知x^n=2,y^n=
【数学】(a^m)^n(-a^3m)^2n/(a^mn)^5=?
数学题(代数)f(n-1)=(x-a)f(n-2)+a(x+a)^(n-2),f(n-2)=(x-a)f(n-3)+a(
一,计算(1)5a^2b*(-2ab^2)^3 (2)(12x^3y-20xy)/4xy二,化简,求值(m+2n)^2-
计算:(3a^n+2+6a^n+1-9^n)÷3a^n-1
已知a^m=2;a^n=5,a^2m+3n=?
a^m=3,a^n=5求a^3m-2n的值
已知A^M=3,A^N=5,求A^M+2N的值
分式 计算:a^(2n+1)-6a^(2n)+9a^(2n-1) / a^(n+1)-4a^n+3a^(n-1)
已知a^m=3,a^n=5,求(1)a^m-n的值(2)a^3m-2n的值