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irina1246 [14]
3 years ago
5

Find the sum of the first 16 terms of the series 14+11+8+5+...-82

Mathematics
1 answer:
Vika [28.1K]3 years ago
5 0

Answer:

-136

Step-by-step explanation:

This series can be written as: (14 - 3*0) + (14 - 3*1) +...+ (14 - 3*n)

The sum of the first 16 terms is:

14*16 <u>- 0 - 3 - 6 - 9 -...</u> = 224 - 360 = -136

This underlined bit can be calculated in many ways, I personally used my calculator, but there are formulas to do so.

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