9(x-3)(x+4)=(2x-1)(2x+1)+5(x-2)^2
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9(x-3)(x+4)=(2x-1)(2x+1)+5(x-2)^2
我算的都要吐血了...
我算的都要吐血了...
![9(x-3)(x+4)=(2x-1)(2x+1)+5(x-2)^2](/uploads/image/z/20098535-23-5.jpg?t=9%28x-3%29%28x%2B4%29%3D%282x-1%29%282x%2B1%29%2B5%28x-2%29%5E2)
9(x-3)(x+4)=(2x-1)(2x+1)+5(x-2)^2
9(x-3)(x+4)=4x^2-1+5x^2-20x+20
9x^2+9x-12*9=9x^2-20x+19
9x-108=-20x+19
29x=127
x=127/29
9(x-3)(x+4)=4x^2-1+5x^2-20x+20
9x^2+9x-12*9=9x^2-20x+19
9x-108=-20x+19
29x=127
x=127/29
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
|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
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),
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
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
(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1)