Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#51 Re: Help Me ! » Sum of infinite series..... » 2025-04-24 00:49:57

Thanks Bob, thanks a lot!

By using the formula you provided and the formula I previously made, I dedrived a new formula for sum of  quadratic series:

.

The formula is:

This might not be a lot useful, but I'm happy that I could do that. I checked it and it was working properly. Thanks Bob, thanks again! smile

Btw MIF is not responding to my emails. Will you try to contact him?

#53 Re: Help Me ! » Sum of infinite series..... » 2025-04-23 13:39:27

Yes I wanted the finite formula. Like if we want to calculate S5, we will have to add 1+4+9+16+25 but we cant use this if we want to calculate large sum like S100. I need the formula because I am trying to make a formula to find the sum of quadratic equations like an^2 + bn + c .

#55 Help Me ! » Sum of infinite series..... » 2025-04-22 23:59:11

ktesla39
Replies: 6

Hi,

Consider a series

which starts from 1 and ends up at infinity.

To find the sum of the series, we have to use

And if we combine it in a formula, we have

But can we factorise or make a simple equation to find

? I mean instead of finding all numbers and adding them, we should make  formula or any equation. I did try a lot but could not get any way. Can I get any help?

#58 Re: Coder's Corner » BBcode Practice » 2025-04-22 01:29:34

Bob wrote:

I rarely try to memorise thngs.  Sometimes they stick through repetition.

Similar to me. I adapt things very fast but never memorise them.

#59 Re: Maths Is Fun - Suggestions and Comments » A new form…or way to reply. » 2025-04-22 01:26:49

I did contact him but he didnt reply. I know you cant upload the code because MIF will have to integrate my code to the original code of this website and upload it to server through FTP or any similar tool.
Thanks for the reply.

#64 Maths Is Fun - Suggestions and Comments » A new form…or way to reply. » 2025-04-20 03:39:38

ktesla39
Replies: 7

Hey, when you try to reply to any post, you have to use the box below (or say textarea). And when you wanna add any BBcode, you have to type every command that you have remembered. That's abit time consuming and complicated as well.

As the solution, I made a way to manipulate textarea data and make it easier to use it. I mean there will be buttons or icons below the textarea. There will be icons, tags and few more. For eg: if you want the icon smile you will just have to click an icon down the box, to add any URL, just the URL option there. Will it be useful? That's upto you....

I need MathIsFun for this.

#65 Re: Exercises » Compute the solution: » 2025-04-18 17:50:30

Hi,
Very nice.

Trust me I didnt use calculator or any tool.

#66 Re: Exercises » Compute the solution: » 2025-04-18 14:50:55

Hi,

If you changed that + to -, result would be fun.

#67 Re: Coder's Corner » BBcode Practice » 2025-04-18 01:28:51

That's why HTML doesn't work here:
<i> Just italics </i>
Neither does PHP:
<?php
echo "Hi";
?>

#68 Re: Coder's Corner » BBcode Practice » 2025-04-18 00:59:49

{i} BBcode <i> html
{b} Bbcode <b> html
{url} ------> <a> /anchor
{u} --------->  <u>
{img} -------> <img>………

Some are similar in HTML and BBcode. Maybe they used those names because they were easy to remember and logical.

I know more HTML than BBcode. The names are logical in HTML:

<canvas> For drawing
<video> For videos
<script> For JavaScript
<title> For title
<font> To change font…………

#69 Re: Help Me ! » Simplifying Fractions » 2025-04-17 23:31:01

Ya for sure it's correct. I was taught it in 9 class. But wasn't explained.

#70 Re: Coder's Corner » BBcode Practice » 2025-04-17 23:28:10

I dont remember the tags. I had used sympy and HTML before. In HTML, things are similar. You use <i>For italics </i>.<b>For bold </b>. And much more. HTML was even more powerful if you used JavaScript and CSS with it.

#72 Re: Coder's Corner » BBcode Practice » 2025-04-17 14:57:32

Hey, I just write 'Hello Guys'. Nothing serious. Using BBCode is fun.

#73 Jokes » PC joke » 2025-04-16 23:00:36

ktesla39
Replies: 0

1) Why isn't there Windows 9?
$ans: Because 7 ate  9

2) Other than computers, what else should Apple Inc develop to save itself?
$ans: A Refrigerator

3) Why did Kiran faint in an Apple Store?
$ans: Because they didn't have windows

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