y=(x2-2x+5)/(x-1) x属于[2,4]的最小值
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y=x2-2x+5(-1
y=(x+1)/(x2+2x+5)的值域
y=x+√(1-x2) y2=x2+(1-x2)+2x√(1-x2)
1.(x-y)(x2+xy+y2) 2.求值x2(x-1)-x(x2+x-1),其中x=2分之一
集合A={y y=x2+2x-1,x∈R},B={x (2-x)(x+5)
Y=2X/(5X+1)Y=1/(X2-2X+2)
y=x2-2x+2(x
函数y=x2+1/x(x
y=x2-2x+1(-1
y=x2-2x(-1
y=x2(x
y=x2(x
1.log2(x)=log4(x),求x2.2^x=5^y,求x/y
求y=(x2+x+1)/(x2+2x+1)(x>0)的最小值
y =2-2x+x2/1-x的值域X2是x的平方
y=(x2-2x+1)/( x2+1)的值域
Y=-x2-2x+3 -5<=x
y=(x-1/X)(X2-1/X2)的导数,