AIME lI
by math154, Apr 1, 2009, 10:41 PM
I think I got a 9. [1,8] and [10]. I definitely should have had [1,11], but I did something with nonnegative/positive on number 9 that ended up giving me an answer of 998 instead of 1000. On number 11, I forgot that 
, so I spent a long time on 
cases and since 
works, I got 
instead of 
. This was probably harder than the AIME I, but I can't be sure. 144 on the AMC10A and a failing 115.5 on the AMC12B. So I made 2 careless mistakes on this, 1 on the 10A, and 6 or so on the 12B. Whatever...
Time to worry about MATHCOUNTS again.
Edit: I just realized, looking at my work, that I was going in a valid direction (not as nice as the trig substitution though), but actually blanked out on 14 and potentially may have gotten it, giving me a 12. But a 12 on the AIME I was much easier to get, so I'll just say the AIME II was harder.
, so I spent a long time on 
cases and since 
works, I got 
instead of 
. This was probably harder than the AIME I, but I can't be sure. 144 on the AMC10A and a failing 115.5 on the AMC12B. So I made 2 careless mistakes on this, 1 on the 10A, and 6 or so on the 12B. Whatever...
Time to worry about MATHCOUNTS again.
Edit: I just realized, looking at my work, that I was going in a valid direction (not as nice as the trig substitution though), but actually blanked out on 14 and potentially may have gotten it, giving me a 12. But a 12 on the AIME I was much easier to get, so I'll just say the AIME II was harder.
This post has been edited 1 time. Last edited by math154, Aug 5, 2010, 8:45 PM
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