oliviarae4269 oliviarae4269

24-02-2021
Mathematics

contestada

Select the correct answer.
What is the sum of the first 30 terms of this arithmetic sequence?
6, 13, 20, 27, 34, ...
OA 3,225
OB. 3,255
OC. 3,325
OD. 3,525

Respuesta :

mt0317247 mt0317247

24-02-2021

Answer:

the answer is A. 3225

Step-by-step explanation:

S₃₀ = 30/2 [ 2 x 6 + (30 - 1) x 7 ]

15 [ 12 + 29 x 7 ]

15 [ 12 + 203 ]

15 x 215

=3225

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