Consumer Utility, Marginal Utility, and Marginal Rate of Substitution

This video examines 5 different utility functions, deriving their corresponding marginal utility functions and solving for the marginal rate of substitution.

[@stephentran16]

This many years later, you sir are still helping students with their homework.

[@ramdevgiri911]

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[@734833]

Exactly what I looked for 3 hours. Thanks

[@callumhatton8354]

Who's watching in 2020?

[@johnblah1040]

2021

[@user-halathegirl]

2023

[@josephchristian2386]

2023✋️

[@theummahunderthespotlight]

2024

[@jesusistheway1820]

2020 you say. 2023

[@kerrykamala947]

I would like to raise an argument, isn't the Marginal Rate of Substition supposed to have a negative sign for instantance MRS = -MU`/MU``

[@sebastian-daquanglocknerjr1883]

whose economics professor is using cruise control and just sending you here?

[@abby-cv4xc]

Kaç video izledim, 8 yıl önce 8 dakikada anlatılmış video etmiyor

[@awardc2389]

Thanks for the easy to understand examples

[@uyangabatbold6122]

This video was very useful. Thanks a lot!

[@Eddy.aamusic]

The only thing I dont understand is how you got the y/2x , the exponent part I dont get I understand how you got 2 but not how the exponents are just gone.

[@Lucas-jc2rq]

he missed the negative. it should be y/2x^-1

[@cosmogamer9914]

@@Lucas-jc2rq nope, he was right

[@aberaabeba2653]

thank you teacher this is amezing video it helps me

[@sithuminijayasekara4782]

thank you .this video is very useful

[@thePrahoable]

OK I have a question why on the first two problems after taking the derivatin of MUx you added also the y and vice versa and on the last two you didn't add the second factor near the derivative of the first?
Thanks a lot very useful but this question came into mind.

[@lolita55ful]

exactly idk why

[@Camcrazy530]

Agreed..... wtf

[@Jimmyczech1]

@@Camcrazy530 because in the first few examples he is multiplying the x and y and in the other cases (where he doesn’t use the Y) he’s adding the two. Derivative of x*y by x = y. Derivative of x+y by x is 1.

[@isaacgomez6570]

@@Jimmyczech1thanks for clearing that up. I was confused for a second there

[@martaschnitzer]

thank you so much this is very helpful youre the best

[@someonethirsty1957]

Im sure this is wrong. Isnt marginal utility supposed to be diminishing? Wouldn't the marginal utlity be increasing in the first example?

[@beastbros45]

What does it help if all you do is get the answer, I don’t know how to do it

[@shantaislamdipa8304]

But Why didn’t MRS Equation Being negative?

[@davecollins7427]

why did you derive in the beginning? how did that get the MU?

[@Tatsgirl490]

Im so confused on how we get the final answers for the examples , can someone please help me understand how exactly we came from 2xy^3/3X^2y^2 = 2y/3x and 1/3X^-2/3Y^2/3÷ 2/3X^1/3Y-1/3= Y/2x 😭😭💀

[@karolinesheefeni8121]

Thank you very much 🎉

[@Weird_Wacky]

thank you so much

[@EconomicsinManyLessons]

You are welcome!

[@Frooty28]

Sir how do we derive the equation of equi marginal utility

[@EconomicsinManyLessons]

This may help: ruclips.net/video/6H4ZHLDBrjY/видео.html

[@rabeccakatongo9493]

I didn't really understand the entire explanation

[@yashodaravithanage9686]

Thank you very much, sir.
but I have some questions in the last few examples. why you didn't add constant factor to the derivative factor

[@utkarshmantri7958]

it's a partial derivative, the constant is ignored

[@EndriHoxha-pz1bt]

But he did at the first example

[@mercytuerijama6698]

since the 3 is brought down already, from where does the square come on the Y

[@EconomicsinManyLessons]

You need to subtract 1 from the exponent on Y, which gives Y^(3-1) = Y^2. I did the same thing for the exponent on X.

[@Thebt7]

Why is the marginal utility for y when derived 3x^2 y^2. sorry my calculus is very bad but i could not figure it out.

[@EconomicsinManyLessons]

U = X^2Y^3
The partial derivative of U with respect to Y = 3X^2Y^(3-1) = 3X^2 Y^2.
Notice that the exponent on the Y term was brought down in front and then we subtracted 1 from the exponent on Y, leaving Y raised to the 2nd power.
Another way of doing this, which might be easier to understand, is to rewrite the utility function as U = bY^3, where b = X^2.
The derivative of bY^3 = 3bY^2. Next, substitute X^2 for b to get your final answer: 3X^2 Y^2.

[@Thebt7]

1sportingclays Thank you, I've watched a couple of times now, starting to pick it up now :)

[@shyrese139benjamin4]

How do u derive the demand function of X and Y?

[@EconomicsinManyLessons]

Hope this helps: ruclips.net/video/jDbVWay6c20/видео.htmlsi=tJxxucTZrc5oXop7

[@rajvirsingh-co1fu]

How to solve u(x,y)=x÷logy

[@barovierkevinallybose1040]

shouldn't there be a minus sign before ur result?

[@EconomicsinManyLessons]

You would only put a minus sign in front of the MRS results if you wanted the slope function of the indifference curve.

[@EndriHoxha-pz1bt]

Who can please answer to this:
U=x²+4xy+4y²-20

[@DierserSebastian-k1q]

Hernandez Kevin Hernandez Lisa Rodriguez Shirley

[@douga.3666]

No i did not go to university... i went to youtube academy)))

[@SidraKhatoon-ml2ft]

derive marshallian demand function

[@tom47235]

How come 2/3 - 1 = -1/3?

[@EconomicsinManyLessons]

2/3 - 1 = 2/3 - 3/3 = -1/3.
(I changed - 1 to - 3/3 to get the same denominator in the other term, 2/3).

[@tom47235]

@@EconomicsinManyLessonsthank you for that

[@changeme454]

wow

[@arnohaoseb351]

(B,Z)=AB^1/a Z^1/B
What's the marginal utility

[@pulltheskymusicgroup4475]

🇹🇿