x+17=3(x+13),2x-11.2=0.6x,2.5x-2.17=21.9-5.8x,8(x-1.5)=x+0.6
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x+17=3(x+13),2x-11.2=0.6x,2.5x-2.17=21.9-5.8x,8(x-1.5)=x+0.6,2(0.5-x)+6=3x-2.53,用方程解
x+17=3(x+13),
x+17=3x+39
x-3x=39-17
-2x=22
x=22/-2
x=-11
2x-11.2=0.6x,
2x-0.6x=11.2
1.4x=11.2
x=11.2/1.4
x=8
2.5x-2.17=21.9-5.8x,
2.5x+5.8x=21.9+2.17
8.3x=24.07
x=24.07/8.03
x=2.9
8(x-1.5)=x+0.6,
8x-12=x+0.6
8x-x=0.6+12
7x=12.6
x=12.6/7
x=1.8
2(0.5-x)+6=3x-2.53
1-2x+6=3x-2.53
-2x-3x=-2.53-1-6
-5x=-9.53
x=9.53/5
x=1.906
x+17=3x+39
x-3x=39-17
-2x=22
x=22/-2
x=-11
2x-11.2=0.6x,
2x-0.6x=11.2
1.4x=11.2
x=11.2/1.4
x=8
2.5x-2.17=21.9-5.8x,
2.5x+5.8x=21.9+2.17
8.3x=24.07
x=24.07/8.03
x=2.9
8(x-1.5)=x+0.6,
8x-12=x+0.6
8x-x=0.6+12
7x=12.6
x=12.6/7
x=1.8
2(0.5-x)+6=3x-2.53
1-2x+6=3x-2.53
-2x-3x=-2.53-1-6
-5x=-9.53
x=9.53/5
x=1.906
x+17=3(x+13),2x-11.2=0.6x,2.5x-2.17=21.9-5.8x,8(x-1.5)=x+0.6
(X+X)+(X-X)+(X*X)+(X/X)=100
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
(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
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1
f(x)=x²+3x|x-2|
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