Friday

December 19, 2014

December 19, 2014

Posted by **Taylor White** on Thursday, March 17, 2011 at 12:35pm.

- geometric sequence -
**Writeacher**, Thursday, March 17, 2011 at 12:50pmPlease type your

__subject__in the**School Subject**box. Any other words,__including obscure abbreviations__, are likely to delay responses from a teacher who knows that subject well.

- arithmetic -
**Reiny**, Thursday, March 17, 2011 at 1:35pmby geometric mean

t7/t6 = t8/t7

t7^2 = (t6)(t8) = 18(50) = 900

so t7 = ± √900 = ±30

or

by definition

ar^5 = 50

ar^7=18

divide the 2nd by the first

r^2 = 18/50 = 9/25

r = ± 3/5

7th term = r x 6th term

= (3/5)(50) = 30 or (-3/5)(50) = -30

**Answer this Question**

**Related Questions**

Math *URGENT - Please give the answers and solutions for each. 1.If the second ...

Math - A sequence is formed by adding together the corresponding terms of a ...

Maths - 1..The first 2 terms of a geometric progression are the same as the ...

Math - 1. Find the common ratio and the 7th term of the sequence 2/9, 2/3, 2, 6...

math Question - the 5th term in a geometric sequence is 160. The 7th term is 40...

math - Determine whether each sequence is arithmetic or geometric. Find the next...

Math - 1. Find the 11th term of the geometric sequence 64, -32, 16, -8, … . 2. ...

math - suppose an arithmetic sequence and a geometric sequence with common ...

Algebra - Determine whether each sequence is arithmetic or geometric. Find the ...

algebra 2 - What is the 20th term of the sequence that begins -3,6,-12,24? A. ...