60 страниц. 2014 год. LAP Lambert Academic Publishing Today is the mechanical era where many challenges have been faced by the people as well as the students . Mathematics is the only subject which helps the people as well as students to keep pace with the mechanical era . so it is very important to develop the attitude of the students towards mathematics so that they can avail the opportunities provided by the subject mathematics and they can adjust themselves with the modern as well as mechanical era.