Consider `y=(2x)/(1+x^2)`, where x is real , then the range of expression `y^2 + y-2` is [a,b].find `b-4a`.

Consider y=(1-x+x^(2))/(1+x+x^(2)),x in R. Number of integers in the range of y is

In the above problem, the complete range of the expression x^(2)+y^(2)-26x+12y+210 is [a, b], then b-2a=

If (x^2)/4+(y^2)/9=1, then find the range of 2x+y

Consider y=(1-x+x^(2))/(1+x+x^(2)),x in R. Range of f(y)=cos y is

Find the range of rational expression y =(x^(2) -x+4)/(x^(2) +x+4) is x is real.

If (x^(2))/(4)+(y^(2))/(9)=1, then find the range of 2x+y.

If x=4(l)/(1+l^(2)) and y=(2-2l^(2))/(1+l^(2)) wherel' is a parameter and range of f(x,y)=x^(2)-xy+y^(2) is[a,b ] then (a+b) is equal to