10(9-x)+x-27=10x+(9-x)怎么解
⒈ 解方程 (X+7)/(X+6)+(X+9)/(X+8)=(X+10)/(X+9)+(X+6)/(X+5)
10*[2-x]-9*[2-x]-8*[2-x]-7*[2-x]=56怎么解
1/x(x+1)+1/(x+1)(x+2)+...+1/(x+9)(x+10)=1/(x+10),解方程
x+10分之9x=19怎么解
10x+6(9-x)=58怎么解?
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+7/x+6)+ (x+9/+x+8)=(x+10/x+9)+(x+6/x+5)
1.x+9/x+8- x+10/x+9=x+6/x+5- x+7/x+6;
x-4/x-6+x-8/x-10=x-5/x-7+x-7/x-9
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(9X/45+10X/40+8X/50)-(8X/40+10X/50+9X/45)=15/60这道题怎么才能解出来