# Math

Given: ________, – 243, – 226, – 209, – 192, – 175, …
The 67th term of the sequence is __________.
The series of the first 27 terms of the sequence is __________.

1. 👍 0
2. 👎 0
3. 👁 97
1. looks like an arithmetic sequence with d = 17
and term2 = -243
a+d = -243
a = - 260

term(67) = a+66d
= -260 + 66(17)
= ...

you should have at your finger-tips the formulas for the sum of n terms
you have the a and the d, so plug in

1. 👍 0
2. 👎 0
posted by Reiny

## Similar Questions

1. ### Algebra

Given ________, – 243, – 226, – 209, – 192, – 175, … a. What is the 67th term of the sequence b. What is the series of the first 27 terms of the sequence

asked by Ruby on September 9, 2014
2. ### Calculus

Find the first 4 terms and the 8th term of the recursively-defined sequence. 4. v1 = 0.75 and vn = (-2)vk-1 for n>1 A. 0.75, 1.5, -3, 6; -192 B. -1.5, -3, -6, -12; 192 C. -1.5, -3, -6, -12; -192 D. 0.75, 1.5, 3, 6; -192 E. 1.5, 3,

asked by Brock on July 10, 2012
3. ### algebra

Solve each equation by factoring. 7x²-243=0 I know I'm supposed to add 243 to the other side but don't know what else to do. Divide maybe? Thanks in advance. -243+7x^2= 0 (reorder) -243+243+7x^2 = 0+243 (add 243 to both sides)

4. ### check!

If the third and ninth temr of a geometric series with a positive common ratio are -3 and -192 repectively, determine the value of the first term a Let a_1 be denoted by 'a' (first terms) then, a_3=r^2 a And, a_9=r^8 a Thus, r^8

asked by JACK!!! on October 19, 2006

√162+11√243-7√128+√192 a.)√2 +17√3 b.)-47√2+107√3

asked by Lizzy on November 11, 2013
1. ### math

Find the fifth term of a geometric sequence whose fourth term is 8/9 and whose seventh term is 64/243.

asked by Alexis on March 16, 2015
2. ### Sequence

What is the fifth term of the sequence a sub n = 1/3^n? a)1/12 b)1/81 c)1/243 d)1/15 If the sequence starts at n = 1 (there is no reason why it should) then it is 1/243

asked by raven 31791 on March 8, 2007
3. ### number pattern

if term 6=-243 and term 3=72 of a geometric sequence determine the constant ratio

asked by lesego on January 31, 2016
4. ### algebra 2

find a10: 192,196,48 an=a1+(n-1)d a10=192+(10-1)(?) i know a1=192, n=10, but what is d? and find nth term of 1,2,4 a1=1 n=? r=?

asked by reina bonilla on June 11, 2015
5. ### Mathematic

Determine the first three terms of the geometric progression of which the 7th term is 192 and te second term is 6

asked by Babazile on October 14, 2016

More Similar Questions