4+6×(3x-2)=16x 13x-4(2x+5)=17(x-2)-4(2x-1)
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4+6×(3x-2)=16x 13x-4(2x+5)=17(x-2)-4(2x-1)
4+6×(3x-2)=16x
4+18x-12=16x
18x-16x=12-4
2x=8
x=4
13x-4(2x+5)=17(x-2)-4(2x-1)
13x-8x-20=17x-34-8x+4
5x-20=9x-30
9x-5x=30-20
4x=10
x=2.5
4+18x-12=16x
18x-16x=12-4
2x=8
x=4
13x-4(2x+5)=17(x-2)-4(2x-1)
13x-8x-20=17x-34-8x+4
5x-20=9x-30
9x-5x=30-20
4x=10
x=2.5
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?
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
2x+3x+4x+5x+x+6x+7x=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
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),
(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:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)