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

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Joined: 19 Nov 2004
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If a is a positive integer greater than 1, then 2^a + 2^a+1 [#permalink]  19 Dec 2004, 17:47
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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
Manager
Joined: 24 Oct 2004
Posts: 96
Followers: 1

Kudos [?]: 1 [0], given: 0

2^a + 2^a+1
=> 2^a + 2^a*2^1
=> 2^a*(1+2)
=> 3*2^a
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