Determine whether the sequence is arithmetic or geometric,

Overath097p

Overath097p

Answered question

2022-03-26

Determine whether the sequence is arithmetic or geometric, and write the formula for the n-th term
5,12,19,
4,12,36,

Answer & Explanation

German Ferguson

German Ferguson

Beginner2022-03-27Added 18 answers

1) 5,12,19,
d=a2a1=125=7
a=a3a2=1912=7
Thus, the sequence is arithmetic
an=a+(n1)d
=5+(n1)7
2) 4,12,36,
d=a2a1=124=3
d=a3a2=3612=3K
Thus, the sequence is geometric
an=arn1
=4×3n1

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