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The first two terms of a geometric sequence are a1 = 1 and a2 = 3. Find a4, the fourth term of the sequence. Question 1 options: A) 81 B) 27 C) 243 D) 9

The first two terms of a geometric sequence are a1 = 1 and a2 = 3. Find a4, the fourth term of the sequence. Question 1 options: A) 81 B) 27 C) 243 D) 9
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The first two terms of a geometric sequence are a1 = 1 and a2 = 3. Find a4, the fourth term of the sequence. Question 1 options: A) 81 B) 27 C) 243 D) 9

User Magnusbl
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1 Answer

6 votes

Answer:

B)

Explanation:

Common ratio = a2/a1 = 3/1 = 3


a_(n)=ar^(n-1)\\\\a_(4)=1*3^3\\\\ = 27

User GarethJ
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