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I think the answer is 2^5 but the answer says 2^8.

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Source: — Problem Solving |

by [email protected] » Wed Jan 29, 2014 4:59 pm
Hi seyna,

The calculation that you've listed ins't completely clear. Could you retype it, using brackets to separate information.

As it's written, it appears to be: 2^6 / (2^3 - 2) = 64/6, but that doesn't sound like what the author intended.

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by seyna » Wed Jan 29, 2014 6:41 pm
That's the only bracket the question shows. As I typed it.
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by rairavig » Wed Jan 29, 2014 8:09 pm
2^(4-1)^2/2^3-2
simplify:-
2^3^2/2^1
2^9/2^1= 2^8
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by seyna » Thu Jan 30, 2014 2:17 pm
Got it. Thanks
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by Matt@VeritasPrep » Mon Feb 03, 2014 4:02 pm
I'm not sure this is right.

If the problem reads

2^(4-1)^2
---------
(2^3) - 2

then you'd have

2^(3)^2
-------
8 - 2

or

2^9
---
6

or

256/3.

If the problem reads

2^(4-1)^2
---------
2^(3-2)

then you'd have 2^9 / 2^1, or 2^8.

But frankly I don't think it's either of these. As written, this question would be interpreted by most computers (such as Wolfram Alpha) as

2^(4-1)^2
--------- - 2
2^3

or 2^6 - 2, or 62.

Seems unclear to me. I'd try to avoid questions that don't have proper exponent formatting, as they may not come from reliable sources.
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