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ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
The opposite of derivative is integration, so in a you need to integrate once and on b, twice. Since the indefinite integral (with no limits of integration) gives you an arbitrary constant that disapears when you derivate, you need a way to find that constant because any number would satisfy the derivative formula since it would disapear when you derivated, thats why they give you one value of the function you want to find. Is it too confusing the way I explained or you got it?
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
b was the confusing one,so am to integrate tcosx 2twice?
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
Yes, because you are derivating twice, but then you get 2 arbitrary constants.
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
whats this for dy(0)/dx=2 what do i need it for?
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
my first integration i got txsin(x)+c
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
Your integration is fine and now you need to determine c, thats when you use dy(0)/dx=2, because by integrating once, you got dy/dx
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
so how do i use this dy(0)/dx=2?
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
txsin(x)+c=dy/dx so t*0sin(0)+c=2 Do you understand that?
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
so what about the y(0)=2?
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
you have dy/dx, but you want y, so you integrate again, and youll need this to find the other constant.
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
So, did you got the answer?
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
i will integrate this txsin(x)+c again?
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
because it is equal to dy/dx, and you want y
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
i got (tx^2/2)+cos(x)+c
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
you forgot to sonsider the constant of the previous integration
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
There will be two constants in this case, because its the second derivative.
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
cx+tx^2/2+cos(x)+c?
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
Yep thats it, but keep in mind that the c's are different, and the first one you should already have it as a number
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
the 1st one is 2 right?
 one year ago

krypton Group TitleBest ResponseYou've already chosen the best response.0
ok thanks alot for your help :)
 one year ago

ivanmlerner Group TitleBest ResponseYou've already chosen the best response.1
You are welcome
 one year ago
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