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

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- anonymous

LoL Derek ! XD

- hartnn

is the common difference also given ?

- anonymous

nope

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- anonymous

its 11

- anonymous

Given yung Common Difference ! 11 :P

- hartnn

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

- anonymous

the common difference is 11, sorry. xD

- agent0smith

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

- hartnn

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

- anonymous

the first term is decreased by5

- hartnn

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

- agent0smith

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

- anonymous

yup it really doesn't

- hartnn

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

- anonymous

yup it really doesn't make any sense

- agent0smith

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

- hartnn

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

- anonymous

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

- hartnn

lol .ok :)

- anonymous

Yes !

- hartnn

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

- anonymous

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

- anonymous

nope :))

- hartnn

okk. just wondering...

- agent0smith

The other question seems broken too...

- anonymous

Yah ! I think so .

- hartnn

thats what i said...

- anonymous

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

- anonymous

doesn't match with the common difference

- 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'.

- hartnn

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

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