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hiramoby Group TitleBest ResponseYou've already chosen the best response.0
the answers are in the screen shot
 2 years ago

hiramoby Group TitleBest ResponseYou've already chosen the best response.0
are you still there?
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
dy/dt xy = 9 dy/dt xy = 9 xy' = 9 y' = 9/7
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
dx/dt xy =  9 yx' =  9 y(7) =  9 y =9/7 y = 9/7
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
I think this is right just using implicit differentiation
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
and chain rule
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
do you understand how I got my answer?
 2 years ago

hiramoby Group TitleBest ResponseYou've already chosen the best response.0
Thank you, help me with my other question please. Yes I did , i was stuck after implicit.. thought it could not be this easy
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
ok send me a link to your next question
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
@Australopithecus I'm confused by what you did in your steps. When you took the derivative, did you remember to apply the product rule? :o
 2 years ago

hiramoby Group TitleBest ResponseYou've already chosen the best response.0
austra i sent you a mail
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
I dont need to apply the product rule because we are taking the derivative in respect to t not in respect to y or x so they are treated as constants
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
No both are variables, unless you're taking a partial derivative, you need to apply the product rule.
 2 years ago

Algebraic! Group TitleBest ResponseYou've already chosen the best response.2
both are functions of time.
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
I did the steps using the product rule and I also came up with 9/7... so maybe just a little bit of luck XD lol
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
oh I guess so :)
 2 years ago

Algebraic! Group TitleBest ResponseYou've already chosen the best response.2
d/dt( x*y=9) = dx/dt*y + x*dy/dt =0 dy/dt = dx/dt *y/x
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
can you break down the steps clearer algebraic!
 2 years ago

Algebraic! Group TitleBest ResponseYou've already chosen the best response.2
it's just use of the product rule on x*y =9 then solving algebraically for dy/dt
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
dw:1351050464937:dw Leibniz notation (with the differentials) can be a little tricky to understand. Maybe if you see it with the primes it'll make some sense :o
 2 years ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
yeah that makes a lot more sense seeing as I had to take the derivative on both sides of the equation and I kept getting 0 Thanks for the refresher
 2 years ago

Algebraic! Group TitleBest ResponseYou've already chosen the best response.2
you do take the derivative on both sides and you do 'get 0'
 2 years ago
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