x+1/x+2-1/x+7=x+2/x+3-1/x+6
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x+1/x+2-1/x+7=x+2/x+3-1/x+6
(x+1)/(x+2)-(x+2)/(x+3)=1/(x+7)-1/(x+6)
[(x+1)(x+3)-(x+2)(x+2)]/(x+2)(x+3)=[x+6-(x+7)]/(x+7)(x+6)
[x^2+4x+3-(x^2+4x+4)]/(x^2+5x+6)=(x+6-x-7)/(x^2+13x+42)
-1/(x^2+5x+6)=-1/(x^2+13x+42)
x^2+5x+6=x^2+13x+42
-8x=36
x=-9/2
括号有点多,不过肯定没错的
[(x+1)(x+3)-(x+2)(x+2)]/(x+2)(x+3)=[x+6-(x+7)]/(x+7)(x+6)
[x^2+4x+3-(x^2+4x+4)]/(x^2+5x+6)=(x+6-x-7)/(x^2+13x+42)
-1/(x^2+5x+6)=-1/(x^2+13x+42)
x^2+5x+6=x^2+13x+42
-8x=36
x=-9/2
括号有点多,不过肯定没错的
|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
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
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值
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),
解方程(x+1/x+2)-(x+2/x+3)=(x+5/x+6)-(x+6/x+7)
解方程:x+2/x+1-x+3/x+2=x+6/x+5-x+7/x+6
x-1\x-2+x-6\x-7=x-2\x-3+x-5\x-6 分式方程
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
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)
解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3