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2. Create an arithmetic sequence up to 5 terms.

Then find the explicit formula for the nth term.

 Feb 24, 2019
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OK...we just get to make it up   

   Let's set a1 = 5

      and d=3

 

a1 = 5

a2 = 5 +3 = 8

a3 = 5+3+3  = 11

a4 = 5 +3+3+3 =14

a5 = 5 +3+3+3+3 = 17

 

an = 5 + (3)(n-1)

 

Edited...... Thanx CPhill for pointing out I answered with a GEOMETRIC series rather than an Arithmetic series !!!

 Feb 24, 2019
edited by ElectricPavlov  Feb 24, 2019

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