G3LOVE♥

happy coming.

hi.
THE BEST DAMN CLASS EVER!
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MATH =]

hey all=]
tomorrow's the last paper, WOO HOO! (:
wanted to post some notes for ya'll. [yea i know, im awesome.]
i dunno bout you guys, but i always get confused with all these real numbers, integers, etc etc.
so i thought i should list it out.
hope it would be of some help.

REAL NUMBERS: All Numbers!

WHOLE NUMBERS: 0,1,2,3,4 and so on. (no decimals, no negatives)

INTEGERS: Includes all positive and negative whole numbers, includes zero, does not include decimals.)

RATIONAL NUMBERS: all numbers in fraction form, e.g (a/b) -[the line should be in the middle, i know.] includes all integers. e.g (5 = 5/1 = fraction.)

PRIME NUMBERS: a whole number, bigger than one, has only 2 factors, 1 and itself.

COMPOSITE NUMBERS: a whole number, bigger than one, has more than 2 factors.

FACTOR TREE: a list of a composite number's prime numbers/factors.
e.g: 340
/ \
2 170
/ \
10 17
/ \
2 5

INDEX NOTATION: (a number with a small number on top. (squared) i can't show it on here. if you don't know, go to Maths 1A textbook pg 6.)

HCF: Highest Common Factor (The one where you divide until there are no more common factors between the numbers.)

LCM: Lowest Common Multiple (The one where you divide until all the numbers become 1)

Note: 9 is the SQUARE of 3. numbers whose square roots are whole numbers= perfect squares
(same thing is applied for cubes.)

HAHA. okay i know those notes are pretty useless, lol. but it helped me to remember, so yeah.
GOOD LUCK TO EVERYBODY!!! =]

love you all, can't wait for the end of examdom.
-Remya xD