3/5X-1/4X=7 8/11:10=4/5:X 3X-16×5=13 X:2/3=0.25:0.2
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/10/04 23:37:21
3/5X-1/4X=7 8/11:10=4/5:X 3X-16×5=13 X:2/3=0.25:0.2
2.5:5=X8 2X+3×0.9=21.7 5X-4.5×2=1/2 X:2/5-1/2:3/10
1/2(4X-8)=4 X:2.5=1.2:7.5
2.5:5=X8 2X+3×0.9=21.7 5X-4.5×2=1/2 X:2/5-1/2:3/10
1/2(4X-8)=4 X:2.5=1.2:7.5
①2.5×8=5×x﹙题目应该是2.5∶5=x∶8吧﹚
x=4
②2x=21.7-3×0.9=19
x=9.5
③5x=0.5+4.5×2=10
x=2
④X:2/5=1/2:3/10
3/10x=2/5×1/2=1/5
x=1/5×3/10
x=2/3
⑤ 1/2(4X-8)=4
等价于2x-4=4
x=4
⑥ X:2.5=1.2:7.5
7.5x=2.5×1.2
x=3÷7.5
x=0.4
检查检查,祝学习愉快~
x=4
②2x=21.7-3×0.9=19
x=9.5
③5x=0.5+4.5×2=10
x=2
④X:2/5=1/2:3/10
3/10x=2/5×1/2=1/5
x=1/5×3/10
x=2/3
⑤ 1/2(4X-8)=4
等价于2x-4=4
x=4
⑥ X:2.5=1.2:7.5
7.5x=2.5×1.2
x=3÷7.5
x=0.4
检查检查,祝学习愉快~
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
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),
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
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
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
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(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
2x+3x+4x+5x+x+6x+7x=100