Answers

2015-04-17T09:15:57+05:30

b) Let n= 4
2n-1= 2×4-1
= 8-1= 7

c) let n=7

2n-1=2×7-1

=14-1=13

d)let n= 12

2n-1= 2×12-1

24-1=23
 the correct answer is b c d

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