# Introducing HashLearn’s Online Test Series (OTS) for JEE Main 2019

The Test Series starts with 10 Live Mini JEEs followed by 10 Live Model JEEs. So, what are Mini JEEs and Model JEEs?

## Mini JEEs and Model JEEs?

Mini JEEs are topic-focused while the Model JEEs are full-syllabus mock exams.

# A Guide to Studying Chemistry

Chemistry can be an intimidating subject. The entire syllabus is roughly divided into three parts – organic chemistry, inorganic chemistry, and physical chemistry. Studying each section seems to be a daunting task as it never seems to end. However, chemistry is in fact a very scoring subject.…

# Study Tips: Differentiation of an Infinite Series

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!)

Consider the following question:
A function y is defined as

Find at x = 0.…

# Last Minute Preparation Tips

It’s that time of the year again. You know what we’re talking about. You must’ve noticed everyone around you suddenly realized that you’re writing all your important exams this year and all of a sudden, the pressure just increased tenfold. However, it’s not as bad as everyone makes it look.…

# Study Tips: Finding the Roots of Unity

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.
• The trick to calculate the nth roots of unity.

# Study Tips: Sum of Infinite Telescoping Series

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 series

A telescoping series is any series where nearly every term cancels with a preceding or following term.…