The points `(-a,-b)`, `(0,0)`. `(a,b)` and `(a^(2),ab))` are

The points (-a,-b) , (0,0) . (a,b) and (a^(2),a^(3)) are

I : The points (2, 5), (0, 3), (2, 1), (4, 3) taken in order form a square. II : The points (-a, -b), (0, 0), (a, b), (a^(2), ab) are collinear.

The points (a, b), (0, 0), (-a, -b) and (ab, b^(2)) are

The points (-a,-b),(a,b),(0,0) and (a^(2),ab), a ne 0, b ne 0 are always

The points (a,b),(0,0),(-a,-b),(ab,b^(2)) are

The points (-a , -b) , ( a^(2) , ab) , (a , b) , ( 0 ,0) ,a ne 0 , b ne 0 are always

If the points (a, 0), (b,0), (0, c) , and (0, d) are concyclic (a, b, c, d > 0) , then prove that ab = cd .

If the points (a, 0), (b,0), (0, c) , and (0, d) are concyclic (a, b, c, d > 0) , then prove that ab = cd .

If the points (a, 0), (b,0), (0, c) , and (0, d) are concyclic (a, b, c, d > 0) , then prove that ab = cd .