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Review for Test
Chapters 1 & 2
PAIR UP!
For each formula below:
1.Explain what the formula would be used for
2.Find a problem on the review that uses the
formula
n(A ´ B) = n(A)× n(B)
an = a1r
n-1
n(A ∪ B) = n(A) + n(B) - n(A ∪ B)
an = a1 + (n - 1)d
1+ 2 + 3 + ... + n = n(n + 1) / 2
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Cardinal number of a Cartesian product
nth term of a geometric sequence
Cardinal number of a union
nth term of an arithmetic sequence
Sum of the first n consecutive natural
numbers
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