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# What is 2''?

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Could someone tell me what 2" means? I'd search for it, but no search engines recognize " . context: show that 2n = O (3n), but 2" does not equal big-Theta (3n) [edited by - Orikal on September 2, 2003 1:46:19 AM]

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Second Dirivative.

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But that doesn't make sense when applied to a constant. To use a hypothetical example, if f = 3 * x^2, then f ' = 6x and f " = 6, meaning the second derivative of 3x^2 is 6. But 2' makes no sense.

~CGameProgrammer( );

[edited by - CGameProgrammer on September 2, 2003 1:31:12 AM]

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quote:
Original post by CGameProgrammer
But 2' makes no sense.

lol, tell me about it. I'm beginning to think it's some weird notation that the author of my textbook invented. Guess I'm not going to get much credit for that problem.

[edited by - Orikal on September 2, 2003 1:45:42 AM]

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Is there any chance the 2" was actually 2n where the top of the n was cut off in the photocopy or scan or bad printing?

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Nah, it''s very clearly a double-prime and someone asked about it in class. Too bad I wasn''t paying much attention at the time.

I think I''m going to assume 2n for its meaning, though, cuz that makes the most sense.

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if it is 2'''', it might just give the answer of 0...

2'' = 0
0'' = 0

... dunno...

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Two inch perhaps??

Sander Maréchal

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yeah, 2" = 2 inches, 2'' = 2 foot

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2 to the power of 11?

• 18
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