Author Arunaa Gurunathan
- Topic tree
- TDS – Terms Definition and Symbols
- DEF – Data, Equations and Formulae
- Concept maps / Model Problem Mapping
- Question bank
- Guided Practice
- Quiz
- Key for quiz
- Project
TOPIC TREE
- Introduction
- Arithmetic Progression
- “n” th term of an A.P.
- Sum of first “n” terms of an A.P.
TERMS, DEFINITIONS AND SYMBOLS
Arithmetic progression (AP) is a list of numbers in which each term is obtained by adding a fixed number to the preceding term except the first term .
Common difference (d) is the fixed number in the arithmetic progression.
Term is each of the numbers in the list.
a is used represent the first term
d is used to represent the common difference
n is used to represent the total terms
an is used to represent the n th term
l is used to represent the last term
Sn is used to represent the sum of the first n terms