Unit-I: Sets and Functions
Unit-II: Algebra
Unit-III: Coordinate Geometry
Unit-IV: Calculus
Unit-V: Mathematical Reasoning
Unit-VI: Statistics and Probability


A set of points satisfying certain condition or conditions is called Locus.

A point belonging to the locus is called a ‘Point on the Locus’.

Chord of Locus:

A line–segment joining the two points of a Locus is a Chord of the Locus.

Equation of a locus:

The equation satisfied by the coordinates of all the points on a locus and by no others is called the equation of /to the locus.


The   x – intercept of a line is x -axis of the point where it intersects the    x -axis and its  y -axis intercept is the  y -coordinate of the point where it intersect the  y -axis.

\to A line parallel to  x -axis (horizontal line) has no x -intercept.

\to A line parallel to  y -axis (vertical line ) has no  y – intercept.

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