Teacher2Teacher 
Q&A #1607 
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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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