[10000印刷√] ƒ|[ƒ‹ƒXƒ~ƒX ƒpƒXƒP[ƒX ƒyƒA 287199
The events X and Y are said to be independent if the probability of X is not affected by the occurrence of Y That is, X, Y independent if and only if P(XY)=P(ot Y) Here P(XY) means the probability of X assuming the occurrence of Y, which is P(X cap Y)/P(Y) So P(X)= P(X cap Y)/P(Y) We get P(X)*P(Y)= P(X cap Y)=P(XY)Summary y=a(xp)(xq) is intercept form of a quadratic equation 'a' is a constant that cannot be 0 'p' and 'q' represent the xintercepts;Proofs using quantifiers "There exists an even prime number" Prime(x) x is an integer > 1 and x is not a multiple of any integer strictlybetween 1 and x even and odd Prove "The square of every even number is even" Eƒ Ae A A ˆa E Sa A A Ae A C Aœ E œas Ae E Az A A A Ae C ƒ|[ƒ‹ƒXƒ~ƒX ƒpƒXƒP[ƒX ƒyƒA
