STRAIGHT LINE   ► Definition:   Straight line is a curve such that every point on the line segment joining any two points in it, entirely lies on it.  🌑 General Equation of Straight Line : Any equation of first degree of t…

Complex Number  What is Complex Number ? The system of real numbers is not sufficient to solve all the algebraic equations. There are no real number which can satisfy the elementary quadratic equation X² + 1 = 0 or X²= -1 ( …

FUNCTION   A relation  ƒ  from  A  to  B  (A,B  are  two  non-empty  sets) is  said  to  be  a function  from  A  to  B  if ∀ x∈A there  exists  a  unique element  y∈B  s.t. (x,y)∈ ƒ .It  is  denoted  by  ƒ :A→B  .  ☛ Doma…

RELATION ☞  Cartesian product of sets