Question

Help!!
Write the nth term of the following sequence in terms of the first term of the sequence.

a, a + 4, a + 8, . . .

@sauravshakya I tried to use the formula you gave me (nth=a+(n-1)d) because I thought it was arithmetic. It would be arithmetic, right?

But if someone else can help, that would be great too!

Answer 1

the formula is a+(n-1)d
a=first term of the sequence
d=common difference

Answer 2

it is an arithmetic sequence

Answer 3

That's what I thought. & I got a+4n-4. Did I do it correct?

Answer 4

right............good

Answer 5

But there is just a slight problem.. It says that it is incorrect.

Answer 6

what is the correct answer then @theequestrian ?

Answer 7

I don't know, I'm still trying to figure that out..

Answer 8

k wait

Answer 9

well the formula applied is right

Answer 10

the answer that you got is perfect that is it is right no mistake there

Answer 11

Hmm. Hold on

Answer 12

Why not? holded .. :D

Answer 13

So this is what my answer is supposed to look like & I have to start in the first square

Answer 14

so u can insert a + 4n - 4 there

Answer 15

is it necessary to fill all squares?

Answer 16

& this is what it looks like when I minster my answer in from above

Answer 17

Well I can fit it & I don't have to use every square, but I do have to start with the first one, like in the last picture do you see how I have a blank space at the first one? I can't do that..

Answer 18

you mean u r unable to put a in the first square

Answer 19

Yes. Like it allows me to, but it won't fit, let me show you

Answer 20

this is how it would look if I started with a in the first square, but I can't have spaces within my equation.

Answer 21

& thank you for helping, this one is yuckkyy

Answer 22

Does that make sense?

Answer 23

well shift the first bracket ( left block

Answer 24

I can't.. They have that one already in place & I can't move it

Answer 25

.. hmn sorry to say : but i can not help further .. m really stuck in this now ..
sorry

Answer 26

It's okay, it'll stump the best of us ! I'll ask my teacher. Thanks for trying though, I really appreciate it :)

Answer 27

thanks and best of luck @theequestrian

have to go now

sorry again

Answer 28

Don't even sweat it, & thanks :)

Answer 29

.:)

Answer 30

Your answer is correct. The only issue I can think of is that it asks you to put it in terms of the first term of the sequence.
Does it consider a to be an adaquate name for the first term of the sequence, or is there some other preference for how it should be indicated, like \(a_1\) or something?

The good news is that it really just comes down to how you have to input this to get the system to accept your answer.

Answer 31

Can I just switch the terms around..?

Answer 32

That shouldn't matter. The truth is, I don't know how this system is designed, so I don't know how it will read your answer or what the requirements or for what it will accept.

All I know is how it SHOULD read your answer, and what it SHOULD accept.

Answer 33

Oh well. At least I have the right answer :) Haha

Answer 34

Gracias :)

Answer 35

Just incase it truly bugged someone, I have the answer now. I had to factor out the 4 from the last two terms which gave me a+4(n-1) as my answer. Thanks again for all y'alls help! Much appreciated!!!

Answer 36

-_- hmph. Well that's dumb.

Answer 37

I knowwww!!!!!!!! I thought the same thing.