3X+(100-X)÷2=100
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3X+(100-X)÷2=100
3X+(100-X)÷2=100
3X+(100-X)÷2=100
3X+(100-X)÷2=100
方程两边乘以2
6x+100-x=200
5x=200-100
5x=100
x=20
3X+(100-X)÷2=100
3x+50-x/2=100
2.5x=50
x=20
3X+(100-X)÷2=100
等号两边×2
6x+100-x=200
5x=100
x=20
3X+(100-X)÷2=100
方程两边乘以2
6x+100-x=200
5x=200-100
5x=100
x=20
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
x+2x+3x+.+100x
(X+X)+(X-X)+(X*X)+(X/X)=100
解方程:(1)2x-19=7x+31 (2)20-2x=x-1 (3)19-x=100-10x (4)1/3x+5=2/3x-62x-19=7x+317x-2x=-19-31这里应该是31+19吧?5x=-50x=-50÷5x=-10
1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)=
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
1x+2x+3x+4x+5x+6x+7x…+99x=100
100×2x+10x+3x+216=100×3x+10×2x+x
已知:f(x)=x(x-1)(x-2)(x-3)……(x-100),求f'(5)
解方程:x-2x+3x-4x+...+99x-100x=25
解方程:x-2x+3x-4x+.+99x-100x=25
x-2x+3x-4x+...+99x-100x=25
已知x^4+x^3+x^3+x^2+x^1+1=0,求x^100+x^99+x^98+x^97+x^96的值
先化简再求值(x+3x+5x+7x+.+101x)-(2x+4x+6x+...100x),其中x=51分之2
3X+(100-X)÷2=100
3X+(100-X)÷2=100