MRS. MEIR SHIFTS STAND AND AGREES TO FORM COALITION
Israeli Premier Meir reverses herself on Mar 4 and agrees, under pressure from her Labor party colleagues, to try to form new coalition cabinet in next 48 hrs; is expected to continue as Premier; had announced on Mar 3 that she was giving up her effort to assemble new coalition because of factionalism that splintered her Labor party; meets with Pres Ephraim Katzir; Katzir says Meir has until midnight Mar 6 to complete new coalition; Opposition leader Menahem Begin suggests that Katzir take initiative in forming emergency natl coalition, embracing both Labor party and his right-wing bloc, Likud; Meir, by agreeing to resume her efforts to form minority govt, virtually rules out possibility that broad coalition might be formed that would include Likud; sources say they doubt Defense Min Dayan would agree to join new govt unless it is expanded to bring in at least ultra-Orthodox Natl Religious party; Defense Ministry is expected to go to Itzhak Rabin if Dayan refuses to join coalition; Meir illus (M)
