设水星环绕一周为x天4x+13=3654x=365-134x=356x=356/4x=88
设水星环绕一周为x天4x+13=3654x=365-134x=356x=356/4x=88
(X+X)+(X-X)+(X*X)+(X/X)=100
设函数f(x)=min{4x-x^2,-x,2x-3},则f(x)的最小值为
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),
设f(x)=1-x,(x
设函数f(x)=|x^2-4x-5|
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
4x+9x=13x
设集合A={x|x>3},B={x| x-1/x-4
设函数f(x)=x2-6x+6,x>=0,3x+4,x
设A={x|(x+2)(x-4)>0},B={x|a≤x
设集合A={x|x平方-2x+4=0},B{x|x