Discrete Mathematics Answers

A = {x / x is an odd number between 5 and 21} is same as------------
a. A = {5,7,9,11,13,15,17,19}
b. A = {5,7,9,11,13,15,17,19,21}
c. A = {x : x is an odd number between 5 and 21}
d. A = {7,9,11,13,15,17,19,21}

x:x is an even number between 12 and 20 is same as------------
a. x = {12,14,16,18,20}
b. x = {12,14,16,18,20}
c. x = {x / x is an even number between 12 and 20}
d. x = {14, 16, 18, 20}

which of the following truly represents a set
a. {1, 3, 1, 6, 0,0}
b. {2, 3, 6, 7}
c. {7, 3, 6, 7,2}
d. {1, 9, 9, 6, 7}

Who has developed the concept of congurences and when has he developed the concept?

who has developed the concept of congurences and when he developed the concept?

Q. where the concept of a function first arose? Also find that who has arosed this concept? Also describe How this concept was first used?

How is a set with one element in it called?

Use Mathematical Induction to prove the following:
(i) 1
2 + 22 + 32 + … + n
2 =

Write a sequence formula?????

1,4,9,16,25,.........