请详细讲讲这题100(0.1X-0.2)/2-10(X+1)/5=3 500(0.1X-0.2)-20(X+1)=30
请详细讲讲这题100(0.1X-0.2)/2-10(X+1)/5=3 500(0.1X-0.2)-20(X+1)=30
为什么(x^2-x-6+1)/(x+2)=x-3+1/(x+2)请解释详细点
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
解方程:x²+1/x²-3(x+1/x)+2=0(请详细解答)
x+3/20x=46 ,x-1/5x=40 ,x-1/2x=3/4 ,x-0.2x=18解方程
解方程:2- x+5/6=x- x-1/3,0.1-0.2x/0.03-1=0.7-x/0.4
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),
1x+2x+3x+4x+5x+6x+7x…+99x=100
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
化简(2x-5)(3x+2)-6(x+1)(x-2),其中x=0.2
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1