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k2yleighterber
k2yleighterber k2yleighterber
  • 14-07-2016
  • Mathematics
Answered

how do you describe the sequence 7,14,21,28

Verified Answer :

olemakpadu
olemakpadu olemakpadu
  • 16-07-2016

The first term, a is 7.

The next term is increased by adding 7.

The sequence is an Arithmetic Sequence.

The common difference d = 14 - 7 = 21 - 14 = 7

For Arithmetic, an = a + (n - 1)d

The nth term =  7 + (n - 1)7 =  7 + 7(n - 1)

= 7 + 7n - 7 = 7n

= 7n

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