Egyptian mathematics had a unique way of writing fractions as sums of unit fractions – that is, fractions of the form 1 n . For example, the fraction 2 9 could be written as 1 6 + 1 18 and also as 1 5 + 1 45 . They would not represent a number like 2 3 as 1 3 + 1 3 ; they would use two different unit fractions. Unit fractions were written by placing the symbol , which looked somewhat like an eye, over the numeral. For example, 1 3 could be written as . In exercises 79 − 82 , write the given fractions as the sum of unit fractions, using our common notation rather than the cumbersome Egyptian notation. (There may be several correct answers but we will give only one.) 2 7
Egyptian mathematics had a unique way of writing fractions as sums of unit fractions – that is, fractions of the form 1 n . For example, the fraction 2 9 could be written as 1 6 + 1 18 and also as 1 5 + 1 45 . They would not represent a number like 2 3 as 1 3 + 1 3 ; they would use two different unit fractions. Unit fractions were written by placing the symbol , which looked somewhat like an eye, over the numeral. For example, 1 3 could be written as . In exercises 79 − 82 , write the given fractions as the sum of unit fractions, using our common notation rather than the cumbersome Egyptian notation. (There may be several correct answers but we will give only one.) 2 7
Solution Summary: The author explains how to write the tion 27 as a sum of unit tions.
Egyptian mathematics had a unique way of writing fractions as sums of unit fractions – that is, fractions of the form
1
n
. For example, the fraction
2
9
could be written as
1
6
+
1
18
and also as
1
5
+
1
45
. They would not represent a number like
2
3
as
1
3
+
1
3
; they would use two different unit fractions. Unit fractions were written by placing the symbol , which looked somewhat like an eye, over the numeral. For example,
1
3
could be written as. In exercises
79
−
82
, write the given fractions as the sum of unit fractions, using our common notation rather than the cumbersome Egyptian notation. (There may be several correct answers but we will give only one.)
Let the universal set be whole numbers 1
through 20 inclusive. That is,
U = {1, 2, 3, 4, . . ., 19, 20}. Let A, B, and C
be subsets of U.
Let A be the set of all prime numbers:
A = {2, 3, 5, 7, 11, 13, 17, 19}
Let B be the set of all odd numbers:
B = {1,3,5,7, . . ., 17, 19}
Let C be the set of all square numbers:
C = {1,4,9,16}
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