Register
1, -3, 9, -27, what is the seventh number in the sequence
160k views
5 votes
1, -3, 9, -27, what is the seventh number in the sequence

User Ronakg
by
6.3k points

1 Answer

0 votes
This sequence can be modeled by
a_(n)=3^((n-1)), and that if n is even, the number becomes negative. So the seventh number would be 3^6, and that is 729, since 7 is odd.
User Wowzer
by
6.7k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

7.4m questions

9.9m answers

Other Questions

Several United States Presidents committed military troops to serve in Vietnam in an effort to a. react to violations of United States neutrality. b. support the policy of containment. c. oppose the Chinese
If a nail reacts with oxygen is it a physical property or chemical
What research Is currently being done on moon rocks?
I need help really quickly can someone help me with the truth table
Which best describes the topics covered by nonfiction works? a. facts and real events b. historical people and events c. ideas that try to influence readers d. events that never occurred
Link Copied!