Arithmetic series Watch

m1m2m3m4m5m6
Badges: 2
Rep:
?
#1
Report Thread starter 6 days ago
#1
The first three terms of an arithmetic series are Y-1, 2y and 4Y-2. Find the fourth and fifth terms. Do not include Y in the answer
0
reply
bia0
Badges: 3
Rep:
?
#2
Report 6 days ago
#2
You add the first to the third one and divide it by two to reach to the second one
Posted on the TSR App. Download from Apple or Google Play
Last edited by bia0; 6 days ago
0
reply
m1m2m3m4m5m6
Badges: 2
Rep:
?
#3
Report Thread starter 6 days ago
#3
why you divided it by 2
(y-1+4y-2)/2=2y
0
reply
Muttley79
Badges: 19
Rep:
?
#4
Report 6 days ago
#4
(Original post by bia0)
(y-1
The terms are
Please edit your post - it is against the rules to post solutions.
0
reply
bia0
Badges: 3
Rep:
?
#5
Report 6 days ago
#5
I've learned it in theory, but if you say that the first term is a1, then the second is a1 + the ratio and the third is a1 + 2*ratio
Then if you add the first and the third and divide them by 2, you get the second one
Posted on the TSR App. Download from Apple or Google Play
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of Roehampton
    Department of Media, Culture and Language; School of Education; Business School Undergraduate
    Tue, 19 Feb '19
  • Edge Hill University
    Undergraduate and Postgraduate - Campus Tour Undergraduate
    Tue, 19 Feb '19
  • University of Kent
    Sciences, Social Sciences and Humanities Further education
    Tue, 19 Feb '19

Do you give blood?

Yes (64)
8.45%
I used to but I don't now (19)
2.51%
No, but I want to start (281)
37.12%
No, I am unable to (185)
24.44%
No, I chose not to (208)
27.48%

Watched Threads

View All
Latest
My Feed