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lgbasallote
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sure
katiebugg
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\[c _{18 12}\]
lgbasallote
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?
best.shakir
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c=0
lgbasallote
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judging from your past questions...this has something to do with arithmetic/geometric sequence?
lgbasallote
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is that a wolfram answer again?
katiebugg
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yeah it does
ash2326
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@katiebugg Please don't post a new question until you are done with your previous one.
Thanks :)
katiebugg
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sorry i got the answer
lgbasallote
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i still dont get what this question means...and why the heck do people LOVE attaching "thanks" at the end of their statements o.O
katiebugg
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i dont get it eaither... the question that is
ash2326
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@katiebugg I can see that you've posted similar questions. Did you understand the concepts involved?
ash2326
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@lgbasallote to sound polite
thanks:)
katiebugg
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kinnda butt not really been upp all night doing this soooo
lgbasallote
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dont use it on me -_- it creeps and freaks me out
katiebugg
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hahaha
lgbasallote
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@katiebugg are there any other conditions or phrases that come along with the question?
ash2326
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@katiebugg it's better to take rest now and start afresh tomorrow.
katiebugg
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nope juse evaluate
katiebugg
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and this has to bee done 2mrw sooo
lgbasallote
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can you write it in bigger text?
katiebugg
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its a C then 18 and 12
lgbasallote
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but where are 18 and 12..beside C? below C? some of the placements are VERY important
katiebugg
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umm subscripts
ash2326
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@katiebugg are you learning combinations?
katiebugg
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yess!!!!!!
lgbasallote
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OH...that makes more sense =_=
katiebugg
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sorry
lgbasallote
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\[\huge nCr = \frac{n!}{r!(n-r)!}\]
does that help?
katiebugg
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ahhhhhhhh!!!!!!!! no
lgbasallote
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for example
\[3C2 = \frac{3!}{2!(3-2)!}\]
lgbasallote
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now does it help?
katiebugg
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this is last one then get to go to bed and no ima still lost :(
lgbasallote
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here's another one...
\[12C10 \implies \frac{12!}{10!(12-10)!} \implies \frac{12!}{10!2!} \implies \frac{12 \times 11 \times \cancel{10!}}{\cancel{10!} 2!} \implies \frac{12 \times 11}{2 \times 1}\]
does that help?
katiebugg
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how do i know were the 18 and the 12 go
lgbasallote
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the bigger one is always in the numerator
lgbasallote
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that's just how i remember it heh
katiebugg
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k thaks!!!!!!!!
lgbasallote
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welcome ^_^
lgbasallote
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spamming random examples of solutions really does help huh...
katiebugg
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:( no i got like the first step and now ima lost
lgbasallote
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oh btw....you're online schooled right?
katiebugg
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just for summer i wanted to jump ahead
soo i took a class
lgbasallote
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hah i knew it..i could tell based on the random jumping of topics haha lol...anyway back to your question
lgbasallote
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what did you get for the first step?
katiebugg
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umm 18/12(6)
lgbasallote
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hmmm you do mean \[\frac{18!}{12!6!}\]
right?
katiebugg
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and u watchin my questions hahah creeper :P and yess
lgbasallote
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the exclamation points are very crucial...
lgbasallote
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heh it's my avatar duty :p
katiebugg
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love that show ahahaha
lgbasallote
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okay here's a hint for you
\[\small 18! \implies 18 \times 17 \times 16 \times 15 \times 14 \times 13\times 12 \times 11 \times 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1\]
\[12! \implies 12 \times 11 \times 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1\]
\[6! \implies 6 \times 5 \times 4 \times 3 \times 2 \times 1\]
does that help?
katiebugg
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just told me what the !!! do right
lgbasallote
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hmm?
lgbasallote
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okay here's another hint \[\large \frac{18!}{12! 6!} \implies \frac{18 \times 17 \times 16 \times 15 \times 14 \times 13 \times 12!}{(12!)(6!)}\]
does that help more?
lgbasallote
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look for something you can cancel..
katiebugg
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and then
lgbasallote
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cancel the cancellable
katiebugg
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ok i think