'PX' ??? I don't known what 'PX' means.
However, in Statisitcs(Maths), when written as 'P(x)' it means the probability of 'x'.
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Prove all x px or all x qx then all x px or qx
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Yes. Suppose x divides y then there exist an integer p such that y = px. Suppose y divides z then there exist an integer q such that z = qy. Therefore z = q*px = qp*x Since p and q are integers then pq is an integer and therefore x divides z. That is to say: if x divides y and y divides z, then x divides z.
The alphabet!The corret answer is alpha,beta,chi,delta,epsilon, gama,iota,kapa,lamdamunuomeaga pi sigma theta or tau and zeda
Depends a lot on the condition. Mint condition could be up to around $800 from the right buyer. Electrical or cosmetic problems bring down the value a lot, though. Most buyers aren't willing to take risks on blown or broken components if the finish isn't really good, and even then the repair costs can be higher than the finished value.