3 years ago

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

1 answer:

6 0

When n = 1 first term = -6
n = 2 second term = 0
n = 3 third term = 6

n = 4 4th term = 12

so we have an Arithmetic sequence first term = -6 and common difference = 6

Sum 14 terms = (14/2)[2*-6 + (14-1)*6]

= 462 answer

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Read 2 more answers

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one number is 1 more than 2 times another. if their sum is increased by sevan, the result is twenty six

Lady bird [3.3K]

the numbers are 6 and 13

let x be one of the numbers then the other is 2x + 1

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