In a right triangle ABC, < C = 900. F is the midpoint of AB, CD is perpendicular to AB and CE bisects < C. Given that < DCE = x0, then < ECF is
Correct Answer : D
Find the number of ordered pairs (x, y) of integers such that 55x2 + 2xy + y2 = 2007
Given that a,b and c are roots of the equation x3 − ax2 + bx − c = 0.find the number of ordered triplets (a, b, c)
The diagonals AC and CE of a regular hexagon ABCDEF are divided by the internal points M and N such that AM/AC = CN/CE = r. Determine r if B,M and N are collinear.