## derek123 2 years ago there are three terms of arithmetic sequence a1=decrease by 5 a2=decrease by 1 a3=twice the original term find the a3..???

1. Poleng_InLove

LoL Derek ! XD

2. hartnn

is the common difference also given ?

3. derek123

nope

4. derek123

its 11

5. Poleng_InLove

Given yung Common Difference ! 11 :P

6. hartnn

common difference = A2-A1 = A3-A2 = 11

7. derek123

the common difference is 11, sorry. xD

8. agent0smith

This is written confusingly... a1=decrease by 5 a2=decrease by 1 a3=twice the original term decrease what by 5??

9. hartnn

A3-A2 = 11 2n - (n-1) =11 can you find 'n' from here ??

10. derek123

the first term is decreased by5

11. hartnn

true! wording are really confusing and question is really weird!

12. agent0smith

The first term is decreased by 5 to make what... ? the second term? itself? It doesn't make a lot of sense.

13. derek123

yup it really doesn't

14. hartnn

@agent0smith look at this also http://openstudy.com/study#/updates/51138785e4b0e554778acff1 better notations

15. derek123

yup it really doesn't make any sense

16. agent0smith

That one makes a lot more sense. Lets use that question.

17. hartnn

unfortunately no... thatsweird too... A2-A1 is not 11 actually....

18. derek123

hahahaha. xD that's my classmate. xD we have the same question

19. hartnn

lol .ok :)

20. Poleng_InLove

Yes !

21. hartnn

and is ploeng in love with derek ?? O.o

22. derek123

hahaha. xD NO!!!!!!!!!!!!!!!

23. Poleng_InLove

nope :))

24. hartnn

okk. just wondering...

25. agent0smith

The other question seems broken too...

26. Poleng_InLove

Yah ! I think so .

27. hartnn

thats what i said...

28. derek123

2n-n-1=11 n=12 substitute it gave me 7,11 and 24

29. derek123

doesn't match with the common difference

30. hartnn

ok...i guess, 11 as common difference(d) should naot have been given. in that case d = A2 - A1 = 4 then A3-A2 = 4 and find 'n'.

31. hartnn

n=3 will give u a3 = 2n = 2*3 =6