/sci/ - Science & Math

[Anonymous No.15166770]

Struggling hard with a math question. Anyone here willing to give me the unblurred version of a chegg answer if I give the link to the question?

[Anonymous No.15166779]

>>15166770
yes

[Anonymous No.15166797]

>>15166779
https://www.chegg.com/homework-help/questions-and-answers/3-plant-model-covered-class-p-n-p-n-1-b-p-n-2-b-0--know-solution-given-p-n-c-1-lambda-1-n--q107591255
Or
https://www.chegg.com/homework-help/questions-and-answers/plant-model-covered-class-pn-1-apn-bpn-1-b-0-know-solution-given-pn-cili-c21-12-al-b-find--q66689991

If you really can help I’ll be so grateful.

[Anonymous No.15166816]

Very often Chegg just reuploads things that are already available elsewhere online
t. knower

[Anonymous No.15166823]

>>15166816
I have been googling for days trying to find this. Can’t find this question or a similar one anywhere.

[Anonymous No.15166828]

If nobody can get the answer unblurred I’d also appreciate help on how to do the question if anyone knows that? The question is here >>15166797. I don’t know if you guys here actually do maths or just have it as a hobby. But I don’t even know where to start.

[Anonymous No.15166896]

>>15166797
>>15166828
This is a type of problem called a recurrence relation, or a difference equation. You can google that but the wikipedia explanation seems decent:
>https://en.wikipedia.org/wiki/Linear_recurrence_with_constant_coefficients#Order_2
(starts at “Order 2” and ends before “In the case of complex eigenvalues…”). It looks like part (a) is asking you to do two things:
i) find out what kind of [math]\lambda_1,\lambda_2[/math] could result in growth to infinity; and
ii) figure out what [math]a[/math] values make the given equation [math]\lambda^2 = a\lambda + 0.5[/math] have roots [math]\lambda_1,\lambda_2[/math] that fit the criteria you found for the first part (i).

I think (b) will be easy after (a) is done

[Anonymous No.15166909]

>>15166896
I know that and how to solve it generally but I don’t know where I would put the ac as the threshold in that equation? The pet of the question that asks what if a=ac makes me think they exist in the equation at the same time. This is the main part I am confused about. Do I just replace a with ac to meet the condition in part a?

[Anonymous No.15166918]

>>15166770

[Anonymous No.15166920]

>>15166918
Thank you. So I do just replace a with ac in the equation for part a?

[Anonymous No.15166927]

>>15166909
Oh, that’s great. Yeah, the second part is literally just asking you to take the answer from the first part, substitute that as “a” in the equation, and describe the recurrence’s behaviour then.

[Anonymous No.15166993]

>>15166927
Im actually still confused about the first part and this >>15166918 isn’t really helping- but I appreciate it!!
For part (a) I substitute 0.5 as b in the pn equation
But then what? How do i know what λ1,λ2 values could result in growth to infinity without having an a value to find those λ roots?
I probably sound slow. I dunno why I can’t wrap my head around this.

[Anonymous No.15167001]

>>15166927
Oh wait is part 2 in >>15166918 the answer to what I just asked?

[Anonymous No.15167018]

>>15166918
STOP POSTING CHATGPT NONSENSE THIS TIME ITS ACTUALLY KIND OF MEAN

[Anonymous No.15167028]

>>15167018
I don’t understand 4-chan humour. Was that a real answer to the question or no?

[Anonymous No.15167034]

>>15166993
>How do i know what λ1,λ2 values could result in growth to infinity
The expression [math]C_1 \lambda_1^n + C_2 \lambda_2^n[/math] is supposed to go to infinity. This is what you use for the (i) part of >>15166896. (I think it is safe to assume C_1,C_2 are just any numbers >0.)

[Anonymous No.15167797]

>>15166770
I always asked my classmates when I couldn't find the answer myself. I hate chegg for putting solutions behind a paywall and I'm not supporting that business practice.

[Anonymous No.15168148]

>>15166770
>>15166797

[Anonymous No.15168153]

>>15166770
>>15166779
>>15166797

[Anonymous No.15168178]

>>15168148
Is that characteristic eq’n in the explanation part in the first pic right though?

I still haven’t completed this question<3 it’s due at midnight, in 4hrs.

[Anonymous No.15168209]

>>15168178
>>15168148
Does anyone know why the character is eq’n isn’t just λ^2 -aλ -0.5 =0

[Anonymous No.15168217]

>I come on /sci/ to waste time with asking people to do my homework for me
Undergrads...

[Anonymous No.15168329]

>>15168217
I got waitlisted for a stats based másters next year and now I’m double thinking it lol.

[Anonymous No.15168655]

https://www.coursehero.com/tutors-problems/Mechanical-Engineering/42446613--/

[Anonymous No.15168742]

https://www.chegg.com/homework-help/questions-and-answers/determine-force-members-cd-cf-ef-transmission-line-q7768279

[Anonymous No.15168960]

Good Morning please upvote answer I have verified it is correct. I need the points this is my job Sir.