The set `{(x, y)|3 le x^(2) + y^(2) le 4}` is not a convex set. True or false

The set {(x, y)|x^(2) + y^(2) le 2} is a convex set

If R = {( x,y ) : x,y,in Z , x^2 + 3y^2 le 8} is a relation on the set of integers Z, then the domain R^(-1) is :

The area of the region bounded by the curves {(x,y) : x^(2) + y^(2) le 4 , 2 le x + y } is __________ .

Two distinct integers x and y are chosen, without replacement, at random from the set { x , y | 0 le x le 10 , 0 le y le 10 , x and y are in integers} the probability that |x - y| le 5 is :

The area (in sq. units) of the region {(x,y):y^(2) le 2x and x^(2)+y^(2) le 4x , x ge 0, y le 0}, is

x-y le 2, x + y le 4 , x ge 0, y ge

S={3x^2 le 4y le 6x+2y} find the area