Chapter 12: Q52. (page 851)
Evaluating a Sum Find the sum.
The sum is 120.
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Forming License Plate Numbers How many different
license plate numbers can be made using 2 letters followed
by 4 digits selected from the digits 0 through 9,
if
(a) letters and digits may be repeated?
(b) letters may be repeated, but digits may not be repeated?
(c) neither letters nor digits may be repeated?
nth Partial Sum Find the first four partial sumsand the nth partial sum of the sequence .
.
The nth partial sum of a sequence is the sum of the first ___ terms of the sequence. So, for the sequence an = n2 the fourth partial sum is S4 = ____ + ____ + ____ + ____ = ____.
Terms of a Sequence Find the first four terms and the 100th term of the sequence whose nth term is given.
Sigma Notation Write the sum without using sigma notation.
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