Descartes' Rule of Signs explained by an IITian 23 Feb 2017 This explanation of Descartes' Rule of Signs was submitted by Ayush, a HashLearn tutor from IIT, Dhanbad. Consider a polynomial equation p(x)=0 (descending powers of x) i) Number of positive roots of the equation p(x)=0 cannot…

Study Tips: Integral of sec(x).cosec(x) 21 Feb 2017 This tip on integration was contributed by one of our top tutors, Shashwat. Following up on our tips on calculus, this week we will explain the trick to finding the integral of the aforementioned function. Want more tips like this?…

Study Tips: Differentiation of an Infinite Series 16 Feb 2017 This tip on calculus was contributed by one of our top tutors, Shashwat. What you will learn from this tip: The trick to differentiate an infinite series. Want more tips like this? Request a session on HashLearn now (it's free!…

Study Tips: Finding the Roots of Unity 14 Feb 2017 This tip on roots of an equation, and complex numbers was contributed by one of our top tutors, Sudheer Naidu. What you will learn from this tip: An understanding of the relation between complex numbers and the roots of unity.…

Study Tips: Sum of Infinite Telescoping Series 11 Feb 2017 This tip on sequences and series was contributed by one of our top tutors, Rushil Shah. What you will learn from this tip: An understanding of a telescoping series The trick to calculate the sum of a telescoping series Telescoping…