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lys-0071 [83]
4 years ago
8

What is the sum of the first 11 terms in the arithmetic sequence if the first term is -3 and the common difference d is 5.  

Mathematics
2 answers:
Ostrovityanka [42]4 years ago
7 0

Answer:

d. 242..................

ratelena [41]4 years ago
7 0

Answer:

d

Step-by-step explanation:

The sum to n terms of an arithmetic sequence is

S_{n} = \frac{n}{2} [ 2a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = - 3 and d = 5, thus

S_{11} = \frac{11}{2} [ (2 × - 3) + (10 × 5) ]

      = 5.5(- 6 + 50)

       = 5.5 × 44

       = 242 → d

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