goodcharlotte20 goodcharlotte20

12-01-2017
Mathematics

contestada

The 12th term of an arithmetic sequence is 36, and the common difference is 3. What is the first term of the sequence?
A. 1
B. 2
C. 3
D. 4

Respuesta :

apologiabiology apologiabiology

12-01-2017

an=a1+d(n-1)
d=3
a12=36

a12=a1+3(12-1)
36=a1+3(11)
36=a1+33
minus 33 both sides
3=a3

C is answer

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devonforrestvlo devonforrestvlo

16-06-2018

the answer is c on edgunity

Answer Link

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