Consider the following theorem. Theorem 9.5.1: The number of subsets of size r that can be chosen from a set of n elements is denote ()- P(n, r) or, equivalently, (:)- M(n-r) where n andr are nonnegative integers with rs n. (:). The notation is also called an r-combination. Compute each of the following using the given theorem. () (a) (b) (c) ) (d) (9) (e)

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Consider the following theorem.
(?)
and is given by the formula
Theorem 9.5.1: The number of subsets of size r that can be chosen from a set of n elements is denoted
(:) -
P(n, r)
or, equivalently,
(:) -
n!
%3D
M(n-r)
where n andr are nonnegative integers with rs n.
(:).
The notation
is also called an r-combination.
Compute each of the following using the given theorem.
(8)
(a)
(b)
(c) )
(d)
(e)
Transcribed Image Text:Consider the following theorem. (?) and is given by the formula Theorem 9.5.1: The number of subsets of size r that can be chosen from a set of n elements is denoted (:) - P(n, r) or, equivalently, (:) - n! %3D M(n-r) where n andr are nonnegative integers with rs n. (:). The notation is also called an r-combination. Compute each of the following using the given theorem. (8) (a) (b) (c) ) (d) (e)
(f)
()
6.
(g)
()
69
Transcribed Image Text:(f) () 6. (g) () 69
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