What is the sum of the first 14 terms of the sequence an= 6n - 12

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asked Mar 17, 2019 110k views

1 Answer

Nikhil Aggarwal · Answer 1 · 2019-03-23T16:51:04+0000

Term 1 = 6*1 - 12
Term 1 = 6 - 12
Term 1 = - 6

Term 14 = 6*14 - 12
Term 14 = 84 - 12
Term 14 = 72

Number of terms = 14

Sum = (term1 + Term14)*number of terms / 2
Sum = (-6 + 72)*14/2
Sum = 66*14/2
Sum = 462

What is the sum of the first 14 terms of the sequence an= 6n - 12

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