Question

There are three terms in Arithmetic Sequence . The common difference is 11 . A1=n-5 , A2=n-1 , and A3=2n . What are the terms ?

Answer 1

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

Answer 2

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

Answer 3

Hmm ...

Answer 4

was that a yes or no ?? O.o

Answer 5

Wait .

Answer 6

waiting...

Answer 7

A2 - A1 = 11
(n - 1) - (n -5) = 11
-1 + 5 = 11
no. 4 does not equal 11.

Answer 8

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'.

Answer 9

How can I find the n ?

Answer 10

why 4 again??

Answer 11

common diff. always remains constant/same!

Answer 12

2n - (n-1) =4

Answer 13

n+1=4

Answer 14

n=5??

Answer 15

is 5+1 = 4 ??

Answer 16

n=3 ?

Answer 17

yes. n=3 :)

Answer 18

Yep, common difference of 4 works here.

Answer 19

n-5=-2
n-1=2
2n=6

Answer 20

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Answer 21

haha i used this d = A2 - A1 = 4

Answer 22

Note that we can't guarantee these are the correct answers, since... the question claims the difference is 11. Either that's wrong, or you didn't write out the question correctly.

Answer 23

That's okay :))

Answer 24

WHAT IF THE COMMON DIFFERENCE IS 9??

Answer 25

from d = A2 - A1
the common diff. must be 4
cannot be anything else.

Answer 26

OH WELL. xD

Answer 27

did you ppl start learning sequences ??

Answer 28

yup,xD arithmetic seq and series and mean and geom seq and series

Answer 29

the formulae actually are mixing in my head. O_o

Answer 30

then going through this might be helpful.... http://openstudy.com/users/hartnn#/updates/503bb2a0e4b007f9003103b0

Answer 31

\[\large{\color{Blue}{T}\color{Yellow}{U}\color{Magenta}{T}\color{Pink}{O}\color{MidnightBlue}{R} I\color{Blue}{A}\color{Green}{L}!}\]
^^ Is it a tutorial on how to have a seizure? :P

Answer 32

nice "tutorial" :)