<div class='quotetop'>QUOTE (BG7 Lavigne)</div><div class='quotemain'></p> I have this problem....</p> </p> Let f(x)= cos x + 3x</p> Show that f has a differentiable inverse</p> Find f(0) and f ' (0)</p> Find f^-1 (1) and (f^-1)'(1)</p> For part c, what is that? Is that just making the cos, into cos^-1 x ???</p> </div></p> no, it's asking you to find the inverse at 1 and the derivative of the inverse at 1. what is the inverse, if you don't mind sharing?</p> </p>
<div class='quotetop'>QUOTE (lukewarmplay)</div><div class='quotemain'></p> might as well post this here as anywhere:puzzle.arpatubes.net/</p> </div></p> </p> Got it on the second attempt. My first wrong attempt was due to me being careless.</p> </p> Edit: I see lukewarm and his 5 attempts. I own you.</p> </p>
I have a test tomorrow need help on similarities among polygons, and solving properties like these,</p> </p> 2x+5/5 = 4/9</p> </p> 3/10=3x-4/7x+1</p> 5/2x-4= 9/3x+1</p> 7/x+1= 2/3</p> </p>
<div class='quotetop'>QUOTE (lukewarmplay)</div><div class='quotemain'></p> might as well post this here as anywhere:puzzle.arpatubes.net/</p> </div></p> I did the one that is up there today about the Spruce Goose, Gin and Tonic and got it on the first attempt</p> </p>
Anyone know how to do this garbage? 1. A marthoner ran the 26.2-mi New York City Marathon in 2.2 h. Show that at least twice, the marathoner was running at exactly 11 mph. and then 2. x^4 + 3x+ 1 = 0, -2 (less then/equal to) x (less then/equal to) -1 For the first one, I don't get it. It doesn't make any sense. The only time that the runner has to go exactly 11 mph is when accelerating, because the runner could finish the marathon at a speed above 11 mph, ujnless it is including the deceleration, which in that case, I still have no idea how I would show that. No idea what the hell they're looking for in the 2nd one.
<div class='quotetop'>QUOTE (BG7 Lavigne @ Jan 14 2008, 12:18 AM) <{POST_SNAPBACK}></div><div class='quotemain'>Anyone know how to do this garbage? 1. A marthoner ran the 26.2-mi New York City Marathon in 2.2 h. Show that at least twice, the marathoner was running at exactly 11 mph. and then 2. x^4 + 3x+ 1 = 0, -2 (less then/equal to) x (less then/equal to) -1 For the first one, I don't get it. It doesn't make any sense. The only time that the runner has to go exactly 11 mph is when accelerating, because the runner could finish the marathon at a speed above 11 mph, ujnless it is including the deceleration, which in that case, I still have no idea how I would show that. No idea what the hell they're looking for in the 2nd one.</div> 1. You know that the runner has to reach 11 mph when accelerating. Perhaps the other is just when they slow down at the other end, lol. 2. I think they just want you to give them the values possible for x in that range. You could use fixed-point iteration, decimal search or the Newton-Raphson method for this.
Somebody help me with this quote, "If you have built castles in the air your work need not be lost; that is where they should be now put the foundations under them". -Henry David Thoreau I'm suppose to find the meaning...But I don't get it.
<div class='quotetop'>QUOTE (Bynumite @ Jan 15 2008, 10:43 PM) <{POST_SNAPBACK}></div><div class='quotemain'>Somebody help me with this quote, "If you have built castles in the air your work need not be lost; that is where they should be.now put the foundations under them". -Henry David Thoreau I'm suppose to find the meaning...But I don't get it.</div> First establish what your goals are, then do the work to make them possible.
I'd say it means that if you begin with broad abstract concepts, don't fault yourself for their being so - just work out the practical part and add that in. While most people work from the bottom up (i.e. small concrete ideas leading to grand concepts), there's no shame in being of the opposite persuasion.
Thoreau is definitely one to appreciate. Walden is worth rereading several times at different stages of one's life.
Project do tomorrow or Friday IDK... create a booklet illustrating 1. Definition of a right triangle 2. Special names for the sides of a right triange 3. State the pythagorean theorm and give atleast one example 4.Define pythagorean triple;give example of at least one family of triples 5.State how to determine if a trianle is acute,right, or obtuse given the length of the three sides; give at least one example 6.State the relationship among the sides of a 30 degree, 60degree, 90degree triange;give at least one example 7. State the relationship among the sides of a 45deg., 45degree, 90deg. triange; give at least one example 8. State the trigonometric ratios of sine,cosine, and tangent, as they relate to right triangle. 9. Create an example of a right triange where you need to use one of the trigonometric ratios to solve for a missing value; work it out; 10 Create a word problem where you need to use one of the trigonometric ratios to solve for a missing value; work it out;
I'm bored so I'll give this a shot. I'll try to help as much as I can, but you should double check just to make sure I'm right, I don't want to give you the wrong answers or anything. <div class='quotetop'>QUOTE (o.iatlhawksfan @ Jan 30 2008, 09:01 PM) <{POST_SNAPBACK}></div><div class='quotemain'>Project do tomorrow or Friday IDK... create a booklet illustrating 1. Definition of a right triangle 2. Special names for the sides of a right triange 3. State the pythagorean theorm and give atleast one example 4.Define pythagorean triple;give example of at least one family of triples 5.State how to determine if a trianle is acute,right, or obtuse given the length of the three sides; give at least one example 6.State the relationship among the sides of a 30 degree, 60degree, 90degree triange;give at least one example 7. State the relationship among the sides of a 45deg., 45degree, 90deg. triange; give at least one example 8. State the trigonometric ratios of sine,cosine, and tangent, as they relate to right triangle. 9. Create an example of a right triange where you need to use one of the trigonometric ratios to solve for a missing value; work it out; 10 Create a word problem where you need to use one of the trigonometric ratios to solve for a missing value; work it out;</div> 1. A triangle with a 90 degrees angle. 2. There's a couple, I can't think of one off the top of my head though, sorry. 3. Pythagorean theorm is a^2 + b^2 = c^2. 4. Pythagorean theorm is an equation you can use to find a missing side to a triangle. "a" and "b" represents two sides of a triangle, while "c" represents the hypothenuse. 5. I don't know about acute or obtuse triangles. I do know that an acute "angle" is less than 90 degrees, and an obtuse "angle" is more than 90 degrees. A right triangle is a triangle with a 90 degrees angle. 6. It is a scalene triangle, I believe all sides must be porportional to each other by three, not exactly sure though. 7. It's an isoceles triangle, two sides are equal, one is not. 8. sin = opposite/hypothenuse, cosine = adjacent/hypothenuse, tangent = opposite/adjacent 9. I don't really understand this question, sorry. 10. Too lazy to make up a word problem. I hope I was somewhat of a help. Sorry I couldn't do everything, I learned this a couple of years ago (Geometry right?) but I can't really recall everything off the top of my head
<div class='quotetop'>QUOTE (BG7 Lavigne @ Jan 13 2008, 07:18 PM) <{POST_SNAPBACK}></div><div class='quotemain'>Anyone know how to do this garbage? 1. A marthoner ran the 26.2-mi New York City Marathon in 2.2 h. Show that at least twice, the marathoner was running at exactly 11 mph. and then 2. x^4 + 3x+ 1 = 0, -2 (less then/equal to) x (less then/equal to) -1 For the first one, I don't get it. It doesn't make any sense. The only time that the runner has to go exactly 11 mph is when accelerating, because the runner could finish the marathon at a speed above 11 mph, ujnless it is including the deceleration, which in that case, I still have no idea how I would show that. No idea what the hell they're looking for in the 2nd one.</div> you can't take the turn off of the 59th street bridge onto 2nd ave at 11 mph given the size of the average crowd. Basic physics.
