Find the maximum and minimum of `y=(x^2+1)/(x^2+x+1).`

Find the maximum and minimum value of x+1/x

Find maximum and minimum values of (x^2-x+1)/(x^2+x+1) using Calculus.

IF x is real , find the maximum and minimum values of (x^2-x+1)/(x^2+x+1) also find the corresponding values of x.

If 'x' be real, find the maximum and minimum value of : y=(x+2)/(2x^(2)+3x+6)

Find the maximum and minimum values of y=6x^(2)-3x^(4)-1 in the interval y=-2lexle3

Find the maximum and minimum values of f(x)=2x^3-24 x+107 in the interval [1,\ 3] .

Find the maximum and minimum values of f(x)=-(x-1)^(2)+2 on R, if any,without using derivatives.

Find the maximum and minimum value of y=|2x+1|-|2x-2|

Find the maximum and minimum value of f(x)=sin x+(1)/(2)cos2x in [0,(pi)/(2)]

Find the maximum and minimum values of f(x)=sin x+(1)/(2)cos2x in [0,pi/2]