Answers

2016-02-03T22:11:02+05:30
The series of some numbers with some relations are said to be a progressions
it have two types
arthemetic progression
example: 2,5,8,11.......
geometric progression
example: 5,15,45......
formulas: a equals a+(n-1)d
sñ equals N/2(2a+(n-1)d ..................etc
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explain it plz
now it's not the time fire me i make it afterwards
u cant edit it later