bunnyboo42 bunnyboo42
  • 26-02-2021
  • Mathematics
contestada

Find the sum of the first 33 terms of the following series, to the nearest
integer.
2,8, 14, ...

Find the sum of the first 33 terms of the following series to the nearest integer 28 14 class=

Respuesta :

reeserl reeserl
  • 26-02-2021

Answer:

3234

Step-by-step explanation:

The series is arithmetic with a common difference = d = 6

First we need to find the 33rd term.  Use the formula [tex]a_{n} = a_{1} + (n - 1)d[/tex] where n = 33 and [tex]a_{1} = 2[/tex]

[tex]a_{33} = 2 + (33 - 1)6 = 2 + 32(6) = 194[/tex]

Now the formula for the sum of an arithmetic series is [tex]S_{n} = \frac{n(a_{1} + a_{n} )}{2}[/tex]

So, [tex]S_{33} = \frac{33(2 + 194)}{2}[/tex]

          = [tex]\frac{33(196)}{2}[/tex]

          = 3234

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