Nguyen Thj Nggc Anh Tap chi KHOA HOC & CONG NGHE 128(14) 127 131 HU''''ONG DAN HOC SINH TRUNG HOC PHO THONG KHA GIOI SU" DUNG PHU''''ONG PHAP SONG ANH GIAI MOT SO BAI TOAN ©EM Nguyln Thi Ngpc Anh Trudng THP[.]
Nguyen Thj Nggc Anh Tap chi KHOA HOC & CONG NGHE 128(14): 127- 131 HU'ONG DAN HOC SINH TRUNG HOC PHO THONG KHA GIOI SU" DUNG PHU'ONG PHAP SONG ANH GIAI MOT SO BAI TOAN ©EM Nguyln Thi Ngpc Anh Trudng THPT Chuyen Thai Nguy TOM TAT Phuong phap song anh ( PPSA) la mgt phucmg phap hay dl giai mgt sl bai toan dim Tu> nhien a nude ta hien c6 it bai viet ve phuong phap va chua tac gia nao de cap den viec day phuang phap nhu thS nao cho doi tugng hpc sinh (HS) kha gioi trung hoc ph6 thong (THPT) Chiing toi xin chia se kinh nghiem day cac khai niem anh xa (AX), don anh (DA), loan anh (TA), song anh (SA), Dong thdi, phan tich mot so vi du vl van dung PPSA vao giai mgt s6 bai loan dim dl giiip HS hilu rfi hon vl phuang phap TCi' kh6a: Phuang phdp song dnh, bdi todn dem MO DAU NQl DUNG NGHIEN CUU Nam 1992, cac tac gia Chen Chuan-Chong va Koh Khee-Meng da viet ve Nguyen li Don anh va Nguyen li Song anh cudn "'Nhiing nguyen li vd kT Ihugl To hgp" Vdi ki hi^u \X\ la sd phan tir ciia tap hgp X, npi dung ciia hai nguyen li dupe tac gia neu nhu sau: Day khai niem AX, DA, TA, SA cho HS kha gidi THPT: Nguyen li Dgn anh (The Injection Principle): Cho A va B la bai tap hgp huu han Neu cd mgt don anh tir A din B, thi |.4 \