# I was absent to progressions class plz any body explain in easy way so i can do my problems easily plzzzz frnds help me....

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2015-03-07T18:40:54+05:30

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Arithmetic progression is a sequence of numbers in which the difference between any two consecutive terms is always constant.
For example: 1,3,5,7,9,11.....; 16,13,10,7....

In 1,3,5,7,9,11.....,
first term = 1
common difference = 3-1 = 2

in 16,13,10,7.....
first term = 16
common difference = 13-16 = -3

you can find the common difference by subtracting any two consecutive number. Given the first term(a) and the common difference(d), you can calculate the nth term of the AP() and sum of n terms of the AP().

do examples. otherwise you won't understand properly.
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