(314-X)4/5-2/3X=40
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(314-X)4/5-2/3X=40
怎么算
怎么算
![(314-X)4/5-2/3X=40](/uploads/image/z/16942620-12-0.jpg?t=%28314-X%294%2F5-2%2F3X%3D40)
(314-X)4/5-2/3X=40
变换:
(314-X)4/5=2/3X+40
314-x=5/4 * (2/3X+40)
314-x=5/6x+50
264-x=5/6x
两边乘以6X(保证X不为零)
264*6X-6X*X=5
解这个二次方程即可
变换:
(314-X)4/5=2/3X+40
314-x=5/4 * (2/3X+40)
314-x=5/6x+50
264-x=5/6x
两边乘以6X(保证X不为零)
264*6X-6X*X=5
解这个二次方程即可
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
2x+3x+4x+5x+x+6x+7x=100
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
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),
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
解方程(x-2)/(x-3)-(x-3)/(x-4)=(x-5)/(x-6)-(x-6)/(x-7)
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
(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)