Posted: 4/6/2006 3:54:54 PM EDT
it is a double integration problem:
integrate (from 0 to 1) the integral (from 0 to x^(1/2)) {15x4y} dydx help me. 

"These days I don't ask for much;
Just the grace of God and my womans touch, Strength each day to face the fight, and place in someones prayers at night." 
is it going to happen?


"These days I don't ask for much;
Just the grace of God and my womans touch, Strength each day to face the fight, and place in someones prayers at night." 
Sorry, took Calc I, II, III in college over 20 years ago, haven't used it since.



calc was 15 years ago man, good luck
txl 


This is why I drink while on the boards.. 


Last calc class Fall semester 1971... Yeah I'll be right on that one...






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I am too drunk to tackle this one, and I really don't use double integrals that much.



badass, thats what i got. ar15.com comes through again! 

"These days I don't ask for much;
Just the grace of God and my womans touch, Strength each day to face the fight, and place in someones prayers at night." 
Get yourself a TI89. They're indispensable for calculus.


I do art on commission. I'm good at it. PM me for my portfolio.

The answer is 5.
First integrate with respect to dy. You get 15XY  2Y^2 dx  0 to x^2 Next, plug in 0 and x^2 whereever you see a Y You get: 15(X)(X^1/2)  2(x^1/2)^2 dx Simplify: 15X^3/2  2X dx Now integrate again with respect to X, you GET: (15/2.5)(X^5/2)  X^2 evaluated at 0 to 1 Plug in the 1 and you get: 6  1 = 5 Your welcome. Fidel 

I will forget more than you will ever know

Damnit too late, but at least I was right.


I will forget more than you will ever know

one more question:
what is the graph of 4x + y^2  4z^2 called? (the name of the shape) 

"These days I don't ask for much;
Just the grace of God and my womans touch, Strength each day to face the fight, and place in someones prayers at night." 
there is one sitting in front of me. 

"These days I don't ask for much;
Just the grace of God and my womans touch, Strength each day to face the fight, and place in someones prayers at night." 
Good job! 


I get: First integrate the central integral, Which comes out to 15xy2y^2. Evaluate this from y=0 to y=x^1/2. This gives 15x^(3/2)2x. Now integrate this with respect to x, getting 6x^(5/2)x^2. Evaluate this from zero to one and get 5. 


it would work this way, but you have to reverse the bounds. that is the hard part, everything else is simple. 

"These days I don't ask for much;
Just the grace of God and my womans touch, Strength each day to face the fight, and place in someones prayers at night." 
Are you shure its not 4x^2? That would make it a hyperboloid of 1 sheet, which is a wellknown shape for calc 3 students. 


I learned multivariable calculus in Calc 4. How have you gone through three semesters of calculus without getting a calculus solving calculator or software?



Me too Calc I, II, II and Diffi Q 18 years ago and I can't remember much of it. 


wrt your first question, I too came up with 5 as the answer, fwiw. (eta... I corrected an oops that I had for an exponent in what follows) Now, this question... assuming an equation, and taking 4x to the other side, and various other algebraic hocus pocus you end up with (1/4)y^2 + z^2 = x. (Ok, it's been a while since I've taken on any Calc III problems, so I resorted to a CRC to refresh my memory). I believe this is going to generate a hyperbolic paraboloid that is saddled over the z axis, with the max/min point located at the origin and the +x axis sitting in the saddle. I just reading back through my description... I do not at the moment have access to Maple or I'd try to slap together something to better illustrate. Hope that helps.... heck, I hope it's right. lol 


i like my pencil and my paper. 

"These days I don't ask for much;
Just the grace of God and my womans touch, Strength each day to face the fight, and place in someones prayers at night." 
i am taking multivariable calc right now..... and failing it.
i've never failed a class before, i'm in serious trouble.... 

I will always value freedom over unity.

When I studied Calculus, we did a 553 semester hour scheme, and III was multivariable. It wasn't that many years ago.. ........... ........... Yes it was. I am in denial. Anyway, we weren't allowed the use of calculators. We were allowed to use the CRC math tables in III, however. My professor (had the same prof for I, II, III and DE) always had this at the top of every quiz and test... LRIEF (to keep people from giving him grief about the calculator issue.. and to possibly catch someone using on during an examination), SAWFCC, SR  Leave results in exact form, show all work for complete credit and simplify results. He was kind of hard core I suppose, but I think probably one of the best professors I ever studied under. Back then, I'm not sure there were any TI graphic calculators available. Maybe the TI 81. We had HPs, by gosh. I've fondled many a calculator over the years, but I still love HPs. Anyway.... I'll shut up with my flashback. As y'all were. 


That's pretty damn refreshing. Cool avatar, btw. Since 1822... 


if you can do it on paper, you know exactly what is happening. i like to see what is going on. i hardly ever use a calculator (for calculus, at least) 

"These days I don't ask for much;
Just the grace of God and my womans touch, Strength each day to face the fight, and place in someones prayers at night." 
That generates this: (it looks like it's flipping back and forth, but it's actually rotating 360deg) 

I do art on commission. I'm good at it. PM me for my portfolio.

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