Visitor

2016-01-12 03:17:28

#1

Hi,

I need to know this problem for an exam.

Let's find out**n** (natural number) for which the set {1, 2, 3, ... , n} has exactly 120 subsets , 2 element subsets.

I need to know this problem for an exam.

Let's find out

Visitor

2016-01-12 05:34:42

#2

The number of the * a* elements subsets of a set with

Visitor

2016-01-12 05:36:21

#3

So,

Visitor

2016-01-12 05:37:17

#4

You have to solve this eqution **n.**

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