44 define the funcion fon k by rz)l,-z rere a1, a 2, ae 1ei cnaas then f has a relative exrernum at the point a) x 2 c d) 2 45. let f:(1,1)-r be a funcion defin

44 Define the funcion fon K by rz)l,-z rere a1, a 2, ae 1ei cnAas Then f has a relative exrernum at the point A) x 2 C D) 2 45. Let f:(1,1)-R be a funcion defined by tri 2x+ sn or z 0 for z Then A) fz) has no point of cxtrerrmum in (-1, 1) B) f) is a decreasing function C fo) 1s, an increasing function D) 1) is neithera decreasing nor an increasing functin in (-1, I)