Ngo\u00e0i c\u00e1c b\u1ea5t \u0111\u1eb3ng th\u1ee9c nh\u01b0 AM -GM, Bunhiac\u1ed1pski… th\u00ec vi\u1ec7c l\u1ee3i d\u1ee5ng c\u00e1c b\u1ea5t \u0111\u1eb3ng th\u1ee9c c\u00f3 s\u1eb5n kh\u00e1c, d\u1ec5 ch\u1ee9ng minh l\u00e0 1 c\u00f4ng c\u1ee5 kh\u00e1 m\u1ea1nh \u0111\u1ec3 t\u00ecm Min – Max c\u1ee7a 1 bi\u1ec3u th\u1ee9c.<\/p>\n

Qua \u0111\u00f3, b\u00e0i gi\u1ea3ng cung c\u1ea5p c\u00e1c d\u1ea1ng b\u00e0i c\u00f9ng 1 s\u1ed1 b\u1ea5t \u0111\u1eb3ng th\u1ee9c ph\u1ee5 gi\u00fap vi\u1ec7c \u0111\u00e1nh gi\u00e1 t\u00ecm Min – Max tr\u1edf l\u00ean \u0111\u01a1n gi\u1ea3n h\u01a1n. PGS.TS Phan Huy Kh\u1ea3i h\u01b0\u1edbng d\u1eabn th\u00ed sinh c\u00e1ch \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p qua c\u00e1c v\u00ed d\u1ee5 trong b\u00e0i gi\u1ea3ng.<\/p>\n

PGS. TS Phan Huy Kh\u1ea3i g\u1eafn b\u00f3 v\u1edbi c\u00f4ng vi\u1ec7c gi\u1ea3ng d\u1ea1y, luy\u1ec7n thi tr\u00ean 40 n\u0103m v\u00e0 l\u00e0 t\u00e1c gi\u1ea3 c\u1ee7a h\u01a1n 115 \u0111\u1ea7u s\u00e1ch \u0111\u00e3 xu\u1ea5t b\u1ea3n.<\/p>\n

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Th\u1ea7y \u0111\u00e3 t\u1eebng tham gia ch\u1ea5m thi To\u00e1n qu\u1ed1c t\u1ebf (IMO) l\u1ea7n th\u1ee9 48 t\u1ea1i Vi\u1ec7t Nam v\u00e0 hu\u1ea5n luy\u1ec7n c\u00e1c \u0111\u1ed9i tuy\u1ec3n To\u00e1n n\u01b0\u1edbc ta \u0111i thi qu\u1ed1c gia, qu\u1ed1c t\u1ebf. R\u1ea5t nhi\u1ec1u h\u1ecdc sinh c\u1ee7a th\u1ea7y \u0111\u00e3 \u0111\u1ea1t gi\u1ea3i cao nh\u01b0: \u0110\u00e0o H\u1ea3i Long (Hai huy ch\u01b0\u01a1ng v\u00e0ng To\u00e1n Qu\u1ed1c t\u1ebf), Nguy\u1ec5n Ti\u1ebfn D\u0169ng (huy ch\u01b0\u01a1ng v\u00e0ng To\u00e1n Qu\u1ed1c t\u1ebf), Ph\u1ea1m Anh Vi\u1ec7t (huy ch\u01b0\u01a1ng \u0111\u1ed3ng To\u00e1n Qu\u1ed1c t\u1ebf),…<\/p>\n

V\u1edbi phong c\u00e1ch gi\u1ea3ng b\u00e0i ch\u1eadm r\u00e3i, ph\u00e2n lo\u1ea1i r\u00f5 r\u00e0ng t\u1eebng n\u00f4\u1ecb dung ki\u1ebfn th\u1ee9c l\u00e0 nh\u1eefng g\u00ec h\u1ecdc sinh nh\u1eadn x\u00e9t sau khi tham gia kh\u00f3a h\u1ecdc c\u1ee7a th\u1ea7y Phan Huy Kh\u1ea3i. H\u1ecdc c\u00e1c b\u00e0i gi\u1ea3ng c\u1ee7a Th\u1ea7y, c\u00e1c b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen v\u1edbi h\u1ec7 th\u1ed1ng b\u00e0i t\u1eadp hay, c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng l\u00ed thuy\u1ebft linh ho\u1ea1t khi gi\u1ea3i c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp.<\/p>\n

Th\u1ea7y \u0111\u1eb7c bi\u1ec7t l\u01b0u \u00fd c\u00e1c b\u1ea1n h\u1ecdc sinh khi h\u1ecdc m\u00f4n To\u00e1n \u0111\u00f3 l\u00e0 c\u1ea7n n\u1eafm v\u1eefng l\u00ed thuy\u1ebft b\u1edfi l\u00fd thuy\u1ebft r\u1ea5t quan tr\u1ecdng v\u1edbi m\u00f4n To\u00e1n.<\/p>\n

V\u1ec1 ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc tr\u1ef1c tuy\u1ebfn, online, Th\u1ea7y Kh\u1ea3i cho r\u1eb1ng: \u201cKhi h\u1ecdc qua h\u1ec7 th\u1ed1ng c\u00e1c b\u00e0i gi\u1ea3ng \u0111i\u1ec7n t\u1eed th\u00ec c\u00e1c em ngo\u00e0i vi\u1ec7c nghe th\u1ea7y gi\u1ea3ng b\u00e0i tr\u1ef1c ti\u1ebfp c\u00f2n \u0111\u01b0\u1ee3c xem h\u00ecnh, xem c\u00e1ch gi\u1ea3i c\u1ea9n th\u1eadn, ph\u1ea7n n\u00e0o kh\u00f4ng hi\u1ec3u c\u00f3 th\u1ec3 xem l\u1ea1i k\u0129 c\u00e0ng. N\u00f3i chung \u0111\u00e2y l\u00e0 m\u1ed9t c\u00e1ch t\u1ef1 h\u1ecdc c\u00f3 s\u1ef1 gi\u00fap \u0111\u1ee1 gi\u00e1n ti\u1ebfp c\u1ee7a c\u00e1c th\u1ea7y c\u00f4 gi\u00e1o, s\u1ebd r\u1ea5t c\u00f3 \u00edch \u0111\u1ed1i v\u1edbi nh\u1eefng em h\u1ecdc sinh mu\u1ed1n h\u1ecdc t\u1ed1t nh\u01b0ng ch\u01b0a th\u1ef1c s\u1ef1 c\u00f3 \u0111\u1ee7 tr\u00ecnh \u0111\u1ed9 ho\u1eb7c ch\u01b0a c\u00f3 ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc ph\u00f9 h\u1ee3p”.<\/p>\n

D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u00e0i gi\u1ea3ng: C\u00e1c d\u1ea1ng b\u00e0i b\u1ea5t \u0111\u1eb3ng th\u1ee9c t\u00ecm Min \u2013 Max c\u1ee7a th\u1ea7y Phan Huy Kh\u1ea3i:<\/p>\n","protected":false},"excerpt":{"rendered":"

Ngo\u00e0i c\u00e1c b\u1ea5t \u0111\u1eb3ng th\u1ee9c nh\u01b0 AM -GM, Bunhiac\u1ed1pski… th\u00ec vi\u1ec7c l\u1ee3i d\u1ee5ng c\u00e1c b\u1ea5t \u0111\u1eb3ng th\u1ee9c c\u00f3 s\u1eb5n kh\u00e1c, d\u1ec5 ch\u1ee9ng minh l\u00e0 1 c\u00f4ng c\u1ee5 kh\u00e1 m\u1ea1nh \u0111\u1ec3… <\/p>\n","protected":false},"author":1,"featured_media":3578,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49,75],"tags":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/3577"}],"collection":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/comments?post=3577"}],"version-history":[{"count":0,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/3577\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/media\/3578"}],"wp:attachment":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/media?parent=3577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/categories?post=3577"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/tags?post=3577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}