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# If a is a positive integer greater than 1, then 2^a + 2^a+1

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Intern
Joined: 19 Nov 2004
Posts: 44

Kudos [?]: 17 [0], given: 0

If a is a positive integer greater than 1, then 2^a + 2^a+1 [#permalink]

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19 Dec 2004, 18:47
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14. If a is a positive integer greater than 1, then 2^a + 2^a+1 = ?

0 3^a+1
0 2^a+1
0 2a
0 2a^a+1
0 3(2^a)

I got lost in answering this question

Kudos [?]: 17 [0], given: 0

Manager
Joined: 25 Oct 2004
Posts: 95

Kudos [?]: 3 [0], given: 0

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27 Dec 2004, 02:06
2^a + 2^a+1
=> 2^a + 2^a*2^1
=> 2^a*(1+2)
=> 3*2^a

Kudos [?]: 3 [0], given: 0

27 Dec 2004, 02:06
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