" If "f(x)=(x^(2)-1)/(x^(2)+1)," for every real number "x," then the minimum value of "

If f(x)=(x^2-1)/(x^2+1) , for every real x , then the maximum value of f

If x is real number, then the minimum value of x^2+x+1 is

If f(x) = frac {x^2 -1}{x^2 +1} , for every real x, then the minimum value of f(x) is.

Let h(x)=f(x)-[f(x)]^(2)+[f(x)]^(3) for every real number 'x' then

Let h(x)=f(x)-(f(x))^(2)+(f(x))^(3) for every real number x . Then

If f(x)=x^2+k where k is a real number then f(x)gek,AAx in R, the minimum value of f(x)=k. If f(x)=k+x^2 where k is a real number and f(x)lek,Aax in R , then maximum value of f(x)=k.