Question

Find the four arithmetic means between 12 and -13.


6, -1, -3, -8

6, 2, -3, -8

7, -1, -3, -8

7, 2, -3, -8

Answer 1

WELCOME TO OPENSTUDY!! :D

Answer 2

To solve these kinds of questions you need to know some stuff.

You will have 12 _ _ _ _ -13
a = 12
An = -13
n = 6

So we have to find d [Common difference] :D

An = a + (n-1)d
-13 = 12 + (5)d
d = -5

Now I hope you know how to go about this... :D

Understood this? :)

Answer 3

thw ques is if a,b,c in A.P. and x is the arthmetic mean of a and b ,y is the artmetic mean of b and c then how to prove that a,x,b,y,c is in A.P

Answer 4

thw?

Answer 5

"Welcome to OpenStudy. I can guide regarding this useful site; ask your doubts from me, for it you can message me. Please use the chat for off topic questions. And remember to give the helper a medal, by clicking on "Best Answer". We follow a code of conduct, ( http://openstudy.com/code-of-conduct ). Please take a moment to read it."

Answer 6

srry

it's the

Answer 7

Did you get the solution to the previous one??

Answer 8

no

Answer 9

What did you not get in that?

Answer 10

Don't jump to the next question..
Finish one and then do.

Answer 11

the ques is if a,b,c in A.P. and x is the arthmetic mean of a and b ,y is the artmetic mean of b and c then how to prove that a,x,b,y,c is in A.P

Answer 12

WHAT?
ARE YOU EVEN LISTENING/LOOKING AT WHAT I TYPED??????

Answer 13

this is my first day and i don't know if have done something wrong but still
i have not got my ans

Answer 14

No problemo! :)

Have you done AP bfore?
If you haven't look up some websites/READ, If you have ask what you did not understand. :)

Answer 15

ya i have learned ap but where is ur ans i can't see here

Answer 16

We cannot give answers here...
We can help you but it is your question and you have to find it out!! :D
I can guide you a 100 times if you want!! :D

Answer 17

ok then just give a hint about the solution of this question

Answer 18

You will have 12 _ _ _ _ -13
a = 12
An = -13
n = 6

So we have to find d [Common difference] :D

An = a + (n-1)d
-13 = 12 + (5)d
d = -5

COMMON DIFFERENCE = -5
Second term = a + d = 12 - 5 = 7
Third term = a+2d = 12-10 = 2

Understood this? :)

Answer 19

YA I KNW VERY WELL about this

Answer 20

but my question is different

Answer 21

You have posted 2 different questions in the same question.
Did you understand and get the answer to the first question?