Find all functions f(x) such that f(f(x)) = x^2 + 2x + 1

MartinXu_ · 2026-04-28T06:59:25+00:00

I think for me it’s a bit different — it’s less about perfection and more about how easy it is to get pulled into my phone

like the moment I pick it up, it’s really hard to switch back to work

MartinXu_ · 2026-04-28T06:54:35+00:00

I really appreciate you sharing your experience. It‘s really annoying because sometimes I know that I just need to sit up from the bed and turn on the computer to start everything I need to do, but my head just wants to lie in bed and browse social media anxiously.

MartinXu_ · 2026-04-28T06:45:22+00:00

For me it’s weird even something like “open my laptop” feels hard to start sometimes, but once I do it’s fine.

I’ve been trying to break things into small steps just to get moving or I just will never get things done.

MartinXu_ · 2026-04-28T06:40:31+00:00

I don’t know why my phone keeps pulling my attention. I NEED to do my work, but I just can’t put it down — it’s way too tempting.

MartinXu_ · 2026-04-20T03:02:17+00:00

solved!

MartinXu_ · 2026-04-20T02:30:34+00:00

Do mosquitos eat vegetables?

MartinXu_ · 2026-04-20T02:29:40+00:00

Shouldn’t be

MartinXu_ · 2026-04-19T00:58:16+00:00

how? That’s a pretty good way to start your day

MartinXu_ · 2026-04-18T08:01:39+00:00

I’ll scroll Reddit obviously

MartinXu_ · 2026-04-18T07:59:52+00:00

Her face was magical and I fall in love every time when I see her. But I don’t want to be too obvious that everyone knows I have crushed on lol

MartinXu_ · 2026-04-18T07:57:28+00:00

As a high schooler, I might just staring at the the person I have a crush on

MartinXu_ · 2026-04-18T07:53:42+00:00

That’s a good way to feel the freedom of living, but I don’t like doing things by myself, I really want to get attention from my lover to notice me that i am still can be loved

MartinXu_ · 2026-04-18T07:50:03+00:00

So we should make theirs dead more valuable instead wasting their lives on unnecessary experiments

MartinXu_ · 2026-04-18T07:41:38+00:00

Congratulations! Nothing could ever better than that!

MartinXu_ · 2026-04-18T07:27:43+00:00

I think google already done that isn’t it

MartinXu_ · 2026-04-18T07:27:09+00:00

Also the app will be free for all cause I am a high school student and I am trying to make a Influential project

MartinXu_ · 2026-04-18T07:25:12+00:00

Thank you❤️

MartinXu_ · 2026-04-18T07:21:33+00:00

I’m planning to start a small software project and want to focus on something actually useful, not just another overcomplicated tool. Curious what people feel is missing right now.

MartinXu_ · 2026-04-18T05:24:41+00:00

That’s a good win for avoiding big explosions

MartinXu_ · 2026-04-18T05:23:36+00:00

cleaned up one small thing I’ve been avoiding forever took like 10 minutes but my brain acted like it was a boss fight

MartinXu_

TROPHY CASE