For the sets of real numbers given by $R_1=\{(x,y):x∈R, y∈R\,x^2+y^2≤25\}$ $R_2=\{(x,y):x∈R, y∈R\,9y≥4x^2\}$ $R_1∩R_2$ is |
one-to-one onto one-to-one and onto none of these |
none of these |
Here $x^2+y^2≤25$ are the elements of R1 lying with in and on the circle $x^2+y^2=25$, where as $4x^2≤9y$ are the elements of R2 lying with in and on the parabola $4x^2=9y$. Hence relation $R_1∩R_2$ is not a function. Hence (D) is the correct answer. |