Ok I have no clue what I am doing, my teacher just assigned the work with out teaching the right stuff so i am so confused!! So please please I need help!! badly! here are pictures of all the home work I need help with.
Take operation: (Z, •) [this is math notation for "The set of all integers under multiplication"--you won't need to know this notation for your class.]
Try a few examples:
-1 • 2
0•3
1•2
Are all of the answers a member of Z (all integers)?
WHAT'S IDENTITY?
The identity element of any operational system is the element that, by the operation and a member of that set, equals that member of the set.
Take division--1.
8÷1 = 8
101 ÷ 1 = 101
1 is the identity element.
INVERSES:
With fractions, this is the "opposite", or reciprocal, of a number. This can be called the multiplicative inverse.
1/2 • 2/1 = 1
3/4 • 4/3 = 1
With multiplication, any number times its inverse will equal one.
I won't give you the other properties; those are easy to just look up online. ^_~
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Cade wrote:Is it a sad thing that I'm in AP Calculus and I don't know how to do half this stuff?
To be fair, I know the properties, but as Sam said, those are easy to teach to yourself via the internet.
I'm the exact same way. I passed AP Calculus and decided to go back and take PreCal this year (taking Cal again next semester since we never even got to integrals the first time *disappointed face*), and I don't even know what the first section on the first picture even means.
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