(X+X)+(X-X)+(X*X)+(X/X)=100
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
1x+2x+3x+4x+5x+6x+7x…+99x=100
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
已知两个函数f(x)={x²,x≥0,-x,x<0,g(x)={x分之1,x>0,-x,x≤0.
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
x:100=1:0.
函数f(x)=(x+1)lnx-x+1.证明:(x-1)f(x)≥0.
设f(x)=x㏑(1+x^2),x≥0.(x^2+2x-3)e^(-x),x<0,求∫f(x)dx
1/x(x+1)(x+2)+1/(x+1)(x+2)(x+3).+1/(x+98)(x+99)(x+100)=?
已知x=100,求x(x+1)分之1+(x+1)(x+2)分之1+(x+2)(x+3)分之1+.+(x+99)(x+10
x^4+X^3+X^2+X^1+1=0求x^100+X^99+X^98+X^97+X^96的值