by Tom
(Malaysia)
The sum of the 1st n positive integers is given by 1/2n(n + 1).
Comments for Quadratic expressions & equations








Find a Math Word here
Can't find the word you are looking for? Do a search here and type your word in the box below
Good, better best.
Never, ever rest.
Until your good is better
And your better is your best.
Like this website?
Like it on facebook!
"I am getting much better test marks and I have been moved up a set"
Sumera
Age 13
England
"High school's great, I'm in a good math set and I understand lots of things, thanks to you"
Eleanor Talbot
Age 11
England
"I really like math now, you just make it more friendly and normal"
Jess Johnson
Age 18
England
"Your writing style is great, informative but friendly! My 12 year old son still struggles with basic maths. I can see your website will be a real treasure trove for us :)"
Jackie
New Zealand
funandfabgiftbasketideas.com
"My grades have improved and I am doing much better than everyone else in my class"
Munira
Age 14
England
"Thanks for teaching me fractions, You made it so easy kalamuni!"
Abrar Haider
Age 8
England