We will be discussing significant concepts provided by Euclid and continue our journey of studying Modular Arithmetic and knowing about Sequences and Finite Series. These ideas are most fundamental to your progress in mathematics for upcoming classes.

**NUMBERS AND SEQUENCES**

Srinivasa Ramanujan was an Indian
mathematical genius who was born in Erode in a poor family. He was a child
prodigy and made calculations at lightning speed. He produced thousands of
precious formulae, jotting them on his three notebooks which are now preserved
at the University of Madras. With the help of several notable men, he became
the first research scholar in the mathematics department of University of
Madras. Subsequently, he went to England and collaborated with G.H. Hardy for
five years from 1914 to 1919.

He possessed great
interest in observing the pattern of numbers and produced several new
results in Analytic Number Theory. His mathematical ability was compared to
Euler and Jacobi, the two great mathematicians of the past Era. Ramanujan
wrote thirty important research papers and wrote seven research papers in
collaboration with G.H. Hardy. He has produced 3972 formulas and theorems in
very short span of 32 years lifetime. He was awarded B.A. degree for research
in 1916 by Cambridge University which is equivalent to modern day Ph.D. Degree.
For his contributions to number theory, he was made Fellow of Royal Society (F.R.S.)
in 1918.

His works continue to delight mathematicians worldwide even today. Many surprising connections are made in the last few years of work made by Ramanujan nearly a century ago.

·
To
study the concept of Euclid’s Division Lemma.

·
To
understand Euclid’s Division Algorithm.

·
To
find the LCM and HCF using Euclid’s Division Algorithm.

·
To
understand the Fundamental Theorem of Arithmetic.

·
To
understand the congruence modulo ‘n’, addition modulo ‘n’ and multiplication
modulo ‘n’.

·
To
define sequence and to understand sequence as a function.

·
To
define an Arithmetic Progression (A.P.) and Geometric Progression (G.P.).

·
To
find the nth term of an A.P. and its sum to n terms.

·
To
find the nth term of a G.P. and its sum to n terms.

·
To
determine the sum of some finite series such as Σn , Σn^{2} , Σn^{3}.

The study of numbers
has fascinated humans since several thousands of years. The discovery of
Lebombo and Ishango bones which existed around 25000 years ago has confirmed
the fact that humans made counting process for meeting various day to day
needs. By making notches in the bones they carried out counting efficiently.
Most consider that these bones were used as lunar calendar for knowing the
phases of moon thereby understanding the seasons. Thus the bones were considered
to be the ancient tools for counting. We have come a long way since this
primitive counting method existed.

It is very true that the patterns exhibited by numbers have fascinated almost all professional mathematicians’ right from the time of Pythagoras to current time. We will be discussing significant concepts provided by Euclid and continue our journey of studying Modular Arithmetic and knowing about Sequences and Finite Series. These ideas are most fundamental to your progress in mathematics for upcoming classes. It is time for us to begin our journey to understand the most fascinating part of mathematics, namely, the study of numbers.

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10th Mathematics : Numbers and Sequences : Introduction | Numbers and Sequences

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