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15 Cards in this Set
- Front
- Back
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natural numbers
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numbers you count with 1,2,3,4...
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integers
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natural numbers, 0, and the negative of the natural numbers
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rational numbers
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numbers can be represented as a/b and a and b are integers, b!=. 3/4 is a rational number
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irrational numbers
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numbers that cannot be represented with a finite number of decimal places. For example pi, or sqrt(2).
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Prime Numbers
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Positve integer not equal to 1, divisible only by 1 and itself 7 and 19.
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fundamental theorem of arithmetic
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any integer acn be written uniquely as the product of prime numbers
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Fractions A/B*C/D
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AC/BD
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a/b+c/d
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ad+cb/bd
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(a/b / c/d) =
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ad/bc
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gcd(a,d)
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greatest common divisor = largest integet which can divide both a and b
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lcm(a,b)
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smallest integer divisible by both a and b, lcm(a,b) = (ab)/gcd(a,d)
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% increase
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(Pt - Pt-1)/Pt-1 * 100
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rate of return
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Pt = (Pt-1) + (Pt-1)*r or Pt/Pt-1 = 1+r
then minus 1 |
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domain
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The domain of an equation is the set of all x’s that we can plug into the equation and get back a real number for y.
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range
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The range of an equation is the set of all y’s that we can ever get out of the equation.
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