(1)4(x-2)^2-(3x-1)^2=0 (2)x^2+5=2√5x (3)2x^2=7x-3^2 (4)4(x-1
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/07/07 14:49:40
(1)4(x-2)^2-(3x-1)^2=0 (2)x^2+5=2√5x (3)2x^2=7x-3^2 (4)4(x-1)^2=3(1-x)
(1)4(x-2)^2-(3x-1)^2=0
(2(x-2)+(3x-1))(2(x-2)-(3x-1))=0
(5x-5)(-x-3)=0
x=1 x=-3
(2)x^2+5=2√5x
x^2-2√5x+5=0
(x-√5)^2=0
x=√5
(3)2x^2=7x-3^2
2x^2-7x+9=0
(2x-9)(x+1)=0
x=9/2 x=-1
(4)4(x-1)^2=3(1-x)
4(x-1)^2-3(1-x)=0
4(x-1)^2+3(x-1)=0
(4x-4+3)(x-1)=0
x=1/4 x=1
(2(x-2)+(3x-1))(2(x-2)-(3x-1))=0
(5x-5)(-x-3)=0
x=1 x=-3
(2)x^2+5=2√5x
x^2-2√5x+5=0
(x-√5)^2=0
x=√5
(3)2x^2=7x-3^2
2x^2-7x+9=0
(2x-9)(x+1)=0
x=9/2 x=-1
(4)4(x-1)^2=3(1-x)
4(x-1)^2-3(1-x)=0
4(x-1)^2+3(x-1)=0
(4x-4+3)(x-1)=0
x=1/4 x=1
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
x(x^2-1)+2x^2 *(x+1)-3x*(2x-5)=x(3x^2-4x)-28
6/(x+1)=(x+5)/[x(x+1)] (3-x)/(x-4)+1/(4-x)=1 2/(1+x)-3/(1-x)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
1x+2x+3x+4x+5x+6x+7x…+99x=100
(X+2)/(X+1)-(X+4)/(X+3)=(X+6)/(X+5)-(X+8)/(X+7)