/sci/ - Science & Math

This thread is for questions that don't deserve their own thread.

Tips!
>give context
>describe your thought process if you're stuck
>try wolframalpha.com and stackexchange.com
>How To Ask Questions The Smart Way http://www.catb.org/~esr/faqs/smart-questions.html

Previous thread: >>9503612

>IQ only 126
>will never discover something amazing and revolutionary
>will never make the world better with amazing new ideas
>will never write a great masterwork of art
why even live my dude

>>9471707
bump

>>9469799
how should I have proceeded

[math]f:\mathbb{R}\to\mathbb{R}[/math] defined by
[eqn]f(x) = \begin{cases}
2-x & x \leq 1 \\ (x-2)^{2} & 1<x<4 \\ 8-x & x\geq 4
\end{cases} [/eqn]
How the HECK do I evaluate [math]f[A][/math], where [math]A = [0,2] [/math]. I understand for discrete sets but this it putting my neurons to the breaking point. It would be the set such that [math](0\leq f(x) \leq 1) \cup (1<f(x)\leq 2)[/math], r-right?

>"Proof is not inside the scope of this course"

How can I learn real analysis in 6 hours before my final tonight?

[eqn]
\ddot \varphi(t) - sin(\varphi(t)) + \alpha\varphi(t) = 0\\
V(x,y) = cos(x) - 1 + \frac{1}{2} *(\alpha x^2 + y^2)
[/eqn]
Show that [math] V(\varphi(t), \dot \varphi(t)) [/math] is constant

>tfw stuck on the first problem of the introductory chapter

>tfw i fell for the STEM meme
>tfw spent years going to uni
>tfw my friends didn't go to school and are earning similar wages working for the government

why did i waste so many years of my life

What jobs can I get with a psychology degree?

Post brainlet filters.
>thermodynamics

>self-teaching calculus
>fail at introduction to calculus
Brainlet feels thread.

>>8892941
>early mental development
>can get better grades than your peers without studying
>teachers and parents praise you for being 2smart
>never learn discipline and work ethics
>grow up to become a failure
I'm sure most brainlets on this board can relate.
School was a mistake.

>tfw can't into kindergarten calculus(indeterminate limits)
What's the easiest way to kill myself as a brainlet?

How much of being a brainlet is genetics and how much of it is the environment?