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Elsharkawy
منذ 8 سنوات
اجابة 1
مشاهدة
140
اجابة (1)
(1) \because ل (ا) = ل (ا )
\therefore ل (ا ) = \frac{1}{2} ل ( ا ) = \frac{1}{4}
( ii ) ل ( ا - ب ) = ل ( ا ) - ل ( ا \cap ب )
= \frac{1}{2} - صفر = \frac{1}{2}
( iii ) ل ( ا \cap ب ) = 1 - ل ( ا \cup )
= 1 - [ ل (ا ) + ل (ب ) ]
= 1- [ \frac{1}{2} + \frac{1}{4} ]
= \frac{1}{4}