SOLUTION: 1. find the 7th term in 16, 8, 4,....
2. Find the sum of the first 11 terms in the sequence 4,6,9...
3. What is the sum of the first 100 even numbers
Algebra.Com
Question 436711: 1. find the 7th term in 16, 8, 4,....
2. Find the sum of the first 11 terms in the sequence 4,6,9...
3. What is the sum of the first 100 even numbers
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
1. find the 7th term in 16, 8, 4,....
a = 7 ; r = (1/2)
a(7) = 7*(1/2)^6 = 7/64
------------------------------------
2. Find the sum of the first 11 terms in the sequence 4,6,9...
a = 4 ; r = 3/2
S(11) = 4[(3/2)^11-1 / (3/2)-1]
-----
S(11) = 4[85.50/0.5]
S(11) = 4[171] = 684
-------------------------------------
3. What is the sum of the first 100 even numbers
---
2+4+6+....+200
200+198+....+2
-----
Adding you get
2S = 100(1st+last)
S = 50*202
Sum = 10,100
====================
Cheers,
Stan H.
RELATED QUESTIONS
The first difference of a sequence is the arithmetic sequence 3, 5, 7, 9, 11, ...... Find (answered by greenestamps,ikleyn)
1)Find the sum of the arithmetic sequence 2, 4, 6, 8, ..., 70.
2)Find the sum of the... (answered by ewatrrr)
Please help me solve the following problems. I've tried to solve the problem but I don't (answered by venugopalramana)
The 6 term in geometric progression is 96 and the 9 term is 768.
Find the sum of the... (answered by josgarithmetic)
Use the geometric sequence of numbers 1, 1/2, 1/4, 1/8,.....to find the following:
a)... (answered by jim_thompson5910)
In a geometric progression of positive terms, the 5th term is 9 times the 3rd term and... (answered by richwmiller)
4. In an arithmetic sequence, the first term is 3 and the second term is 7.
a. Find the (answered by Boreal)
THE 2ND AND 7TH TERM OF A G.P ARE 18 AND 4374 RESPECTIVELY. FIND THE
1) COMMON... (answered by josgarithmetic,Edwin McCravy,mccravyedwin,ikleyn,AnlytcPhil)
In a geometric sequence, the sum of the fourth term to the sixth term is 1\3 the sum of... (answered by KMST)