SOLUTION: The first 4 terms of the following sequence an= 3^(n-1)are: A) 1, 4, 8, 23 B) 1,-3, 9, 27 C) -1, 2, 8, 25 D) 1, 3, 9, 27

Algebra ->  Sequences-and-series -> SOLUTION: The first 4 terms of the following sequence an= 3^(n-1)are: A) 1, 4, 8, 23 B) 1,-3, 9, 27 C) -1, 2, 8, 25 D) 1, 3, 9, 27      Log On


   

Question 1083612: The first 4 terms of the following sequence an= 3^(n-1)are:
A) 1, 4, 8, 23
B) 1,-3, 9, 27
C) -1, 2, 8, 25
D) 1, 3, 9, 27
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

The first 4 terms of the following sequence a%5Bn%5D=+3%5E%28n-1%29are:
A) 1, 4, 8, 23
check:
a%5B1%5D=+3%5E%281-1%29=3%5E0=1
a%5B2%5D=+3%5E%282-1%29=3%5E1=3...since second term is 4, it means option A is not your answer
B) 1,-3,+9, 27
check:
a%5B1%5D=+3%5E%281-1%29=3%5E0=1
a%5B2%5D=+3%5E%282-1%29=3%5E1=3...since second term is -3, it means option B is not your answer

C) -1, 2, 8, 25
check:
a%5B1%5D=+3%5E%281-1%29=3%5E0=1...since first term is -1, it means option C is not your answer
D) 1,+3, 9, 27
check:
a%5B1%5D=+3%5E%281-1%29=3%5E0=1
a%5B2%5D=+3%5E%282-1%29=3%5E1=3
a%5B3%5D=+3%5E%283-1%29=3%5E2=9
a%5B4%5D=+3%5E%284-1%29=3%5E3=27-> all terms are same, so your answer is option +D