2x+0.5x=10
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
解方程X-0.5X=15 X-0.8X=10 2.5X+2X=9
x+2x×10=10x+2x+36
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),
20+4x=6x-24 3(3x-2)=10-0.5(x-3.5)
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
2(0.9-x)+4=4.3.(x+1.8)/8=6.6.12x+12=16x.12x-35=5x.X/0.5-10+2
4a+3a-2a=?2b-b+0.5b=?10x-(7x+x)=?6x-1.5x=?8x+4x-8x=?7.5x-x+2
先化简再求值先化简再求值:(x-x/x+1)(x+1/x^2+4x+4)(x^2-4/x^2-2x),其中x=-0.5
1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980