From: Robert <wll2lee1asingnet.com.sg>
To: Teacher2Teacher Public Discussion
Date: 2002013009:11:27
Subject: help on doubt for maths

	Q1)Let A be a set with 12 elements and B be the set 18 elements.State
how many elements are in A u B for the two cases given below:
i) There are 6 elements in A  intersect B
ii) A subset and equal to B

Q2) let the sets A and B be defined by 
A={a,b,c,d}
B={1,2,3}
i) How Relations are there between A and B
ii) How many funtions are thre A to B

                                          n
Q3) Prove by mathematical induction that 3  <n! wherever n is a
positive integer greater than or equal to 7.

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