debrarayas debrarayas
  • 10-09-2018
  • Mathematics
contestada

The first two terms of an arithmetic sequence are a1 = 2 and a2 = 4. What is a10,the tenth term?A. 19 B. 10 C. 18 D. 20

Respuesta :

musiclover10045
musiclover10045 musiclover10045
  • 10-09-2018

Finde the difference between each one:

d =  A2 - a1 = 4-2 = 2

sequence formula:

an = a1 + (n-1) *d

a10 = 2 + (10-1) * 2

a10 = 2+9 *2

a10 = 2+18

a10 = 20


The answer is D.

Answer Link
KennyStudys
KennyStudys KennyStudys
  • 10-09-2018
Since the difference between a1-a2 is 2, just multiply it 2x10 which is D
Answer Link

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