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How to solve the initial value problem? y'' - 4y' - 5y = 0?
y(-1) = 3 y'(-1) = 9
2 AnswersMathematics9 years agoHow do you solve this separable differential equation?
dy/dx = sec^2(y) / (1 + x^2)
I keep getting tan(y) = arctan(x) + c. My textbook says the answer is 2y + sin(2y) = 4arctan(x) + c.
I just want to know what I'm doing wrong in this.
2 AnswersMathematics9 years agoHow does one go from ln|y - 1| to ln(1 - y)?
In an explanation of an equation, my textbook did this step, but I don't understand how that is possible. It said that it exchanged |y - 1| with (1 - y) because this equation is interested in y near the initial value y = 0.
This is a differential equation problem if that makes a difference.
2 AnswersMathematics9 years agoWhat is a flexible alkyl chain?
I'm currently going over splitting in H NMR spectroscopy, and my textbook says that certain rules aren't followed if the alkyl chain is flexible. I don't remember ever seeing that phrase before. Can anyone explain what this means?
1 AnswerChemistry9 years agoHow do you solve this implicit differentiation problem?
Determine if e^(xy) + y = x - 1 is a solution to dy/dx = [e^(-xy) - y] / [e^(-xy) + x]
Every attempt I've made at solving this problem leads to [1 - y*e^(xy)] / [1 + x*e^(xy)].
1 AnswerMathematics9 years agoCan you explain how this example of implicit differentiation works?
How does this process work?
d/dx [ x + y + e^(xy) ] = 1 + dy/dx + e^(xy) (y + x dy/dx) = 0
1 AnswerMathematics9 years agoHow do you solve for x in the equation 2e^(x-2) = 100?
4 AnswersChemistry10 years agoWhy does my calculator say syntax error?
Whenever I try plot a graph, my calculator will show the graph and then flash syntax:error. It shows the right graph, but after it's done plotting, it will go to the error screen. Is there something wrong? Is there some setting I need to change?
1 AnswerMathematics1 decade agoCan you mail a plastic bottle of soda within the US?
I wanted to send a friend of mine a bottle of soda that they don't sell where she lives, but I'm not sure if this is legal. Does anyone know for sure?
2 AnswersNon-Alcoholic Drinks1 decade agoDo I have to get a new piercing?
I want to get an industrial piercing, but I already have two holes in my left ear in the places I want to have the piercing. Can I put a bar through those holes, or should I just get an industrial in my right ear? I would like to have an industrial and I'm willing to get another piercing, but if I don't have to go through another piercing to get an industrial, I'd like to know beforehand.
2 AnswersOther - Skin & Body1 decade agoTegan and Sara.. who can i compare them too?
I'm writing a paper for my English class. I am analyzing musicians from different genres and showing that despite the differences in musical style their themes are similar. Could someone help me come up with artists to compare them to? I'm trying to find people that have similar themes to their songs but are in completely different genres kind of like comparing country to rap. It doesn't have to be that extreme. I just need something.
2 AnswersRock and Pop1 decade agoDoes Disney make porn?
I've heard on many occasions from many different people that disney creates porn. At first it surprised me but then they pointed out that pirates of the carribean was a disney movie and even though its not porn.....its not exactly mickey either. So really i was wondering if it was true.
6 AnswersOther - Television1 decade agoWhy is it that whenever I drink any coffee based product it makes me tired?
Everytime I drink coffee or something I fall asleep. It's not just from that crash after the caffeine high. I fall asleep while drinking them. I fall asleep after eating ice cream sundaes if they have chocolate syrup on them. Warm milk doesn't put me to sleep, I fall asleep after drinking chocolate milk or a cappuccino. It's so confusing.
3 AnswersOther - Food & Drink1 decade ago