Let Ebe the set of all even positive integers in the universe Zof integers, and XE : Z R be the characteristic function of E. Then
1. XE(2) =
2. XP(-2) =
3. {z 62: XE() = 1} =

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.