[Number Sequence]What changes need to be made in the formula 4/(2n+1) for calculating the terms of a sequence in order for every second term to be negative?

2021.12.01 10:31 MegasVazeloktonos [Number Sequence]What changes need to be made in the formula 4/(2n+1) for calculating the terms of a sequence in order for every second term to be negative?

I need to create a one-line formula for calculating any term from the following sequence:

  1. -4/3, 4/5, -4/7, 4/9, -4/11, ...
I have found that the formula 4/2n+1 calculates the absolute value of each term, but I need also to find a way to alternate between positive and negative terms.
By "one-line formula" I mean that I don't want a function, since I am trying to solve this in the context of a computer program, meaning that I only have one line to write my code in this scenario.
Thanks in advance!
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2021.12.01 10:31 lgats TouchGFX CO., LTD SmartWatch TGW007 (2A2SG-TGW007)

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2021.12.01 10:31 timesofglory How do I get Pep? Help

Okay, so I’m a 21 year old student living at home with my parents. It’s 7 AM right now, and last night at around 11 PM I met up with a guy I met on Grindr who lives about 10 minutes from me. Throughout chatting he mentioned he was clean, negative for hiv, covid, hpv, etc. as well as how he’s on prep, and gets tested through his life insurance. I’m not on prep, negative, and went over to meet him. We had sex and he came in me. I didn’t even notice he did until after I was blowing him and he said he already came in me. After we finished I asked if he was negative and he said yeah and that he has tests he could show me and I just said I believed him (dumb, I know) and then left. He said let’s hang again soon and slapped my ass when I left. After we talked I messaged him on Grindr asking when the last time he had sex was, and if he was really tested a few months ago like he said. He told me to relax and not freak out, and that I am probably just worrying a lot after going on an impulse. I did ask him a lot of questions and he seemed to get kinda upset, but he sternly said he’s negative and no matter how many times I ask that wouldn’t change, but to get tested later on if I want to have some relief.
My question is, should I get on Pep? From what I’ve read the risk is fairly low that he has HIV AS WELL AS me catching it. I know there’s still a risk, but is it worth getting Pep?
I’ve read that I couldn’t even get pep unless I know for sure that he is HIV +
And to be honest, he seemed fairly normal, and I don’t see why he’d have a reason to lie about being negative if he’s on prep.
Also, it costs around $2000? How would I pay for that, especially without my parents finding out?
Could anyone please give me some advice/guidance? Am I overthinking this?
I don’t plan on bottoming again, I’ve just been bi curious.
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2021.12.01 10:31 Sam2190 McLaren F1 drawing I did as a school project (it’s my favorite car). Enjoy!

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2021.12.01 10:31 BartDrown How to read data from memory?

Hi, I've got a question.
I want to archive my playthrough data in runtime. I want to track certain games scores and send it to persistent storage while I'm playing/at the end of the game. I know that it might need tweaks to fit certain game as different games stores their data in different places, but I really could use a hint where to start even.
I plan on focusing around SNES games, initially thought about MAME core, but if in other cores it would be easier to get data, nothing is holding me in MAME. Do you have any clue how I could do that? Any resources or ideas how to start? I would be very grateful for any help.
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