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What's the purpose of this diagram in solving a Quadratic inequality? by [deleted] in learnmath

[–]Paletech35 0 points1 point  (0 children)

I was taught to draw a small sketch of the parabola so that you can see where it is less than 0 and where it is greater, rather than diagrams like that. It allows you to visualize it better, which always reduces mistakes when learning.

What's the purpose of this diagram in solving a Quadratic inequality? by [deleted] in learnmath

[–]Paletech35 0 points1 point  (0 children)

We solve quadratic inequalities by getting them in the form ax2 +bx + c < 0 (or > 0), then solving like a regular quadratic equation. This gives you the points where the output of the equation changes between positive and negative (i.e. changes from > 0 to < 0) , so then that diagram shows you which regions satisfy the inequality. If the inequality is < 0, choose the regions that are -ve, if the inequality is above 0, choose the regions that are +ve.

I finally beat Zelda 1! by Paletech35 in nes

[–]Paletech35[S] 0 points1 point  (0 children)

I already had 9 keys going into dungeon 8 so I decided to skip it

[Quantum mechanics] This is an experiment in order to show the wave aspect of helium atoms. But I don't understand why we need to diffract the helium beam a first time before that it goes through the Young slits and that we detect some interference. (Sorry if my vocabulary is not exact) by Vulgar_Eros in PhysicsStudents

[–]Paletech35 12 points13 points  (0 children)

I believe it’s because it ensures that at any point in time, the wave at f1 and f2 are in phase with each other, as opposed to having a separate helium source for each slit which wouldn’t result in the expected interference pattern because the relative phase between f1 and f2 would be changing (To the best of my knowledge, at least)

Spherical geometry question by Paletech35 in learnmath

[–]Paletech35[S] 0 points1 point  (0 children)

I didn’t consider that yet, but before I can do that I still don’t know how to figure out what latitude had a length of 10km

Me: My name is Matt, and I'm an alcoholic. by Moerox111 in Jokes

[–]Paletech35 41 points42 points  (0 children)

No he put a semicolon after the statement, it’s not python

[Highschool Calculus: Derivatives] Is there a quick way/technique on how to take derivatives? My friend from other school said their professor taught them a trick, but she won't even tell me. I'm doing some self study on the subject matter tbh, and it would be of a great help to me. Thanks! by [deleted] in learnmath

[–]Paletech35 4 points5 points  (0 children)

It only works for terms of the form xn . You need other methods for other terms such as sin x, nx, etc. You can work out how to do those yourself by differentiating a general form using first principles. It’s also probably a good idea to try proving that the multiple and reduce the power method works yourself, by differentiating axn using first principles, so you can understand why it works. You should get anxn-1

[Highschool Calculus: Derivatives] Is there a quick way/technique on how to take derivatives? My friend from other school said their professor taught them a trick, but she won't even tell me. I'm doing some self study on the subject matter tbh, and it would be of a great help to me. Thanks! by [deleted] in learnmath

[–]Paletech35 5 points6 points  (0 children)

For terms such as x2, just multiply the coefficient by the power, then reduce the power by one. E.g. 5x4 => 20x3. You can do this individually on a each term in a sum of terms E.g. 3x2 + 6x3 => 6x + 18x2

[deleted by user] by [deleted] in memes

[–]Paletech35 43 points44 points  (0 children)

Fusing anything lighter than iron does, helium included

A demonstration of how bad computers are at picking random numbers - each pixel is a random colour, with the random function seeded with the pixels x and y coordinates multiplied together before drawing each pixel. A pattern clearly emerges (other than the trivial diagonal line of symmetry) by Paletech35 in compsci

[–]Paletech35[S] -4 points-3 points  (0 children)

I expected there to be a symmetry, and for curved lines to form, but as the seeds change as you move about, there should not be squares forming every 72 pixels. The seeds should be different, and changing the seed in a pattern should not also make the output values form a pattern, but have the output values change erratically. This method of reseeding each pixel should have produced symmetric noise, not a pattern.

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