{"id":402,"date":"2026-05-05T04:43:54","date_gmt":"2026-05-05T04:43:54","guid":{"rendered":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/bo-de-khao-sat-chat-luong-thang-2-toan-11-co-dap-an-va-loi-giai\/"},"modified":"2026-05-05T07:16:37","modified_gmt":"2026-05-05T07:16:37","slug":"bo-de-khao-sat-chat-luong-thang-2-toan-11-co-dap-an-va-loi-giai","status":"publish","type":"post","link":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/bo-de-khao-sat-chat-luong-thang-2-toan-11-co-dap-an-va-loi-giai\/","title":{"rendered":"B\u1ed9 \u0111\u1ec1 kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u00e1ng 2 To\u00e1n 11 c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i"},"content":{"rendered":"<p><span>Luy\u1ec7n t\u1eadp To\u00e1n 11 hi\u1ec7u qu\u1ea3 h\u01a1n v\u1edbi <strong>B\u1ed9 \u0111\u1ec1 kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u00e1ng 2 To\u00e1n 11 c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i<\/strong>. T\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c bi\u00ean so\u1ea1n b\u00e1m s\u00e1t ch\u01b0\u01a1ng tr\u00ecnh, gi\u00fap h\u1ecdc sinh h\u1ec7 th\u1ed1ng h\u00f3a ki\u1ebfn th\u1ee9c v\u00e0 l\u00e0m quen v\u1edbi c\u00e1c d\u1ea1ng b\u00e0i thi chu\u1ea9n. V\u1edbi h\u1ec7 th\u1ed1ng c\u00e2u h\u1ecfi \u0111a d\u1ea1ng c\u00f9ng \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i chi ti\u1ebft, \u0111\u00e2y ch\u00ednh l\u00e0 b\u1ed9 \u0111\u1ec1 gi\u00fap b\u1ea1n t\u1ef1 tin chinh ph\u1ee5c k\u1ef3 thi. H\u00e3y c\u00f9ng <a href=\"https:\/\/tailieuonthi.edu.vn\/\" rel=\"noopener\" target=\"_blank\"><strong>Tailieuonthi<\/strong><\/a> kh\u00e1m ph\u00e1 ngay b\u1ed9 t\u00e0i li\u1ec7u n\u00e0y nh\u00e9!<\/span><\/p>\n<h2><span><strong>N\u1ed9i dung B\u1ed9 \u0111\u1ec1 kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u00e1ng 2 To\u00e1n 11 c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i<\/strong><br \/>\n<\/span><\/h2>\n<p><strong>B\u1ed9 \u0111\u1ec1 kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u00e1ng 2 To\u00e1n 11 c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i<\/strong> g\u1ed3m 102 trang. C\u00e1c \u0111\u1ec1 thi \u0111\u01b0\u1ee3c bi\u00ean so\u1ea1n theo c\u1ea5u tr\u00fac g\u1ed3m 3 ph\u1ea7n: tr\u1eafc nghi\u1ec7m nhi\u1ec1u ph\u01b0\u01a1ng \u00e1n l\u1ef1a ch\u1ecdn (12 c\u00e2u), tr\u1eafc nghi\u1ec7m \u0111\u00fang sai (4 c\u00e2u) v\u00e0 tr\u1eafc nghi\u1ec7m tr\u1ea3 l\u1eddi ng\u1eafn (6 c\u00e2u).<\/p>\n<p><strong>Tr\u00edch m\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi trong B\u1ed9 \u0111\u1ec1 kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u00e1ng 2 To\u00e1n 11 c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i:<\/strong><\/p>\n<p><strong>Ph\u1ea7n 1: Tr\u1eafc nghi\u1ec7m nhi\u1ec1u ph\u01b0\u01a1ng \u00e1n l\u1ef1a ch\u1ecdn<\/strong><\/p>\n<p><span><strong>C\u00e2u 1:<\/strong> Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang?<br \/>\nA. Hai m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi nhau th\u00ec m\u1ecdi \u0111\u01b0\u1eddng th\u1eb3ng n\u1eb1m trong m\u1eb7t ph\u1eb3ng n\u00e0y s\u1ebd vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng kia.<br \/>\nB. Hai m\u1eb7t ph\u1eb3ng ph\u00e2n bi\u1ec7t c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t m\u1eb7t ph\u1eb3ng th\u00ec vu\u00f4ng g\u00f3c v\u1edbi nhau.<br \/>\nC. Hai m\u1eb7t ph\u1eb3ng ph\u00e2n bi\u1ec7t c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t m\u1eb7t ph\u1eb3ng th\u00ec song song v\u1edbi nhau.<br \/>\nD. Hai m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi nhau th\u00ec m\u1ecdi \u0111\u01b0\u1eddng th\u1eb3ng n\u1eb1m trong m\u1eb7t ph\u1eb3ng n\u00e0y v\u00e0 vu\u00f4ng g\u00f3c v\u1edbi giao tuy\u1ebfn c\u1ee7a hai m\u1eb7t ph\u1eb3ng s\u1ebd vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng kia.<br \/>\n<\/span><\/p>\n<p><span><strong>C\u00e2u 2:<\/strong> Trong m\u1ed9t bu\u1ed5i v\u0103n ngh\u1ec7 c\u00f3 20 nam v\u00e0 18 n\u1eef. H\u1ecfi c\u00f3 bao nhi\u00eau c\u00e1ch ch\u1ecdn ra m\u1ed9t \u0111\u00f4i nam n\u1eef \u0111\u1ec3 h\u00e1t song ca? (A).  C\u2082\u2080\u00b9 \u00b7 C\u2081\u2088\u00b9  (B).  A\u2082\u2080\u00b9 \u00b7 A\u2081\u2088\u00b9  (C).  C\u2082\u2080\u00b2 \u00b7 C\u2081\u2088\u00b9  (D).  C\u2082\u2080\u00b9 \u00b7 C\u2081\u2088\u00b2 <\/span><\/p>\n<p><strong>Ph\u1ea7n 2: Tr\u1eafc nghi\u1ec7m \u0111\u00fang sai<\/strong><\/p>\n<p><strong>C\u00e2u 1:<\/strong> Cho  cos \u03b1 = -(\u221a15)\/(4)  v\u1edbi  \u03c0\/2 &lt; \u03b1 &lt; \u03c0 . C\u00e1c kh\u1eb3ng \u0111\u1ecbnh sau \u0111\u00e2y \u0111\u00fang hay sai?<br \/>\na)  sin \u03b1 &lt; 0 .<br \/>\nb)  cos(\u03c0 &#8211; \u03b1) &gt; 0 .<br \/>\nc)  (sin \u03b1 + cos \u03b1)\u00b2 = (8 &#8211; \u221a15)\/(8) .<br \/>\nd)  2cos\u03b1 &#8211; 3cos(\u03c0 &#8211; \u03b1) + 5sin(7\u03c0\/2 &#8211; \u03b1) + cot(3\u03c0\/2 &#8211; \u03b1) = -\u221a15 .<\/p>\n<p><strong>C\u00e2u 2:<\/strong> Cho ph\u01b0\u01a1ng tr\u00ecnh  4^x &#8211; 2.2^x &#8211; m = 0  (1). M\u1ed7i kh\u1eb3ng \u0111\u1ecbnh sau \u0111\u00e2y \u0111\u00fang hay sai?<br \/>\na) \u0110i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh (1) l\u00e0  x &gt; 0 .<br \/>\nb) \u0110\u1eb7t  t = 2^x  ( t &gt; 0 ) ph\u01b0\u01a1ng tr\u00ecnh (1) tr\u1edf th\u00e0nh ph\u01b0\u01a1ng tr\u00ecnh:  t\u00b2 &#8211; 2t &#8211; m = 0 <br \/>\nc) Khi  m = 15  ph\u01b0\u01a1ng tr\u00ecnh (1) c\u00f3 nghi\u1ec7m duy nh\u1ea5t.<br \/>\nd) Kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb nguy\u00ean n\u00e0o c\u1ee7a  m  \u0111\u1ec3 ph\u01b0\u01a1ng tr\u00ecnh (1) c\u00f3 hai nghi\u1ec7m ph\u00e2n bi\u1ec7t.<\/p>\n<p><strong>Ph\u1ea7n 3: C\u00e2u tr\u1eafc nghi\u1ec7m tr\u1ea3 l\u1eddi ng\u1eafn<\/strong><\/p>\n<p><strong>C\u00e2u 1:<\/strong> Cho h\u00ecnh ch\u00f3p  S.ABC  c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u1ea1nh  a ,  SB perp (ABC)  v\u00e0  SB = 4a . T\u00ednh g\u00f3c gi\u1eefa \u0111\u01b0\u1eddng th\u1eb3ng  SC  v\u00e0 m\u1eb7t ph\u1eb3ng  (SAB) ? (l\u00e0m tr\u00f2n \u0111\u1ebfn h\u00e0ng \u0111\u01a1n v\u1ecb)<\/p>\n<p><strong>C\u00e2u 2:<\/strong> M\u1ed9t t\u1ed5 10 ng\u01b0\u1eddi s\u1ebd \u0111\u01b0\u1ee3c ch\u01a1i hai m\u00f4n th\u1ec3 thao l\u00e0 c\u1ea7u l\u00f4ng v\u00e0 b\u00f3ng b\u00e0n. C\u00f3 5 b\u1ea1n \u0111\u0103ng k\u00fd ch\u01a1i c\u1ea7u l\u00f4ng, 4 b\u1ea1n \u0111\u0103ng k\u00fd ch\u01a1i b\u00f3ng b\u00e0n, c\u00f3 2 b\u1ea1n \u0111\u0103ng k\u00fd ch\u01a1i c\u1ea3 hai m\u00f4n. H\u1ecfi x\u00e1c su\u1ea5t ch\u1ecdn \u0111\u01b0\u1ee3c m\u1ed9t b\u1ea1n \u0111\u0103ng k\u00fd ch\u01a1i th\u1ec3 thao l\u00e0 bao nhi\u00eau?<\/p>\n<h2><span><strong>T\u1ea3i B\u1ed9 \u0111\u1ec1 kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u00e1ng 2 To\u00e1n 11 c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i<\/strong><br \/>\n<\/span><\/h2>\n<p><span><strong>B\u1ed9 \u0111\u1ec1 kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u00e1ng 2 To\u00e1n 11 c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i<\/strong> gi\u00fap h\u1ecdc sinh r\u00e8n luy\u1ec7n t\u01b0 duy logic v\u00e0 k\u1ef9 n\u0103ng gi\u1ea3i to\u00e1n hi\u1ec7u qu\u1ea3. <strong>\u0110\u1ec1 c\u01b0\u01a1ng \u00f4n t\u1eadp to\u00e1n 11<\/strong>\u00a0n\u00e0y r\u1ea5t h\u1eefu \u00edch \u0111\u1ec3 c\u00e1c b\u1ea1n hi\u1ec3u r\u00f5 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i v\u00e0 tr\u00e1nh sai s\u00f3t trong qu\u00e1 tr\u00ecnh l\u00e0m b\u00e0i. H\u00e3y click v\u00e0o \u0111\u01b0\u1eddng d\u1eabn d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 t\u1ea3i t\u00e0i li\u1ec7u nh\u00e9!\u00a0\u00a0<\/span><\/p>\n<p><iframe height=\"480\" loading=\"lazy\" src=\"https:\/\/drive.google.com\/file\/d\/1jaMhQCe1I_u8xSNiZE7V8k0PMPqu5p4-\/preview\" width=\"640\"><\/iframe><br \/><a class=\"migration-iframe-fallback\" href=\"https:\/\/drive.google.com\/file\/d\/1jaMhQCe1I_u8xSNiZE7V8k0PMPqu5p4-\/view\" rel=\"nofollow noopener\" target=\"_blank\">M\u1edf t\u00e0i li\u1ec7u n\u1ebfu khung xem tr\u01b0\u1edbc kh\u00f4ng hi\u1ec3n th\u1ecb<\/a><\/p>\n<p><a class=\"custom-button\" href=\"https:\/\/drive.google.com\/file\/d\/1jaMhQCe1I_u8xSNiZE7V8k0PMPqu5p4-\/view\" rel=\"noopener nofollow\" target=\"_blank\"><span>T\u1ea3i B\u1ed9 \u0111\u1ec1 kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u00e1ng 2 To\u00e1n 11 c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Luy\u1ec7n t\u1eadp To\u00e1n 11 hi\u1ec7u qu\u1ea3 h\u01a1n v\u1edbi B\u1ed9 \u0111\u1ec1 kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u00e1ng 2 To\u00e1n 11 c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i. T\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c bi\u00ean so\u1ea1n b\u00e1m s\u00e1t ch\u01b0\u01a1ng tr\u00ecnh, gi\u00fap h\u1ecdc sinh h\u1ec7 th\u1ed1ng h\u00f3a ki\u1ebfn th\u1ee9c v\u00e0 l\u00e0m quen v\u1edbi c\u00e1c d\u1ea1ng b\u00e0i thi chu\u1ea9n. V\u1edbi h\u1ec7 th\u1ed1ng c\u00e2u h\u1ecfi [&#8230;]\n","protected":false},"author":1,"featured_media":1601,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[61],"class_list":["post-402","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tong-hop","tag-tong-hop"],"_links":{"self":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/comments?post=402"}],"version-history":[{"count":1,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/402\/revisions"}],"predecessor-version":[{"id":1602,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/402\/revisions\/1602"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media\/1601"}],"wp:attachment":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media?parent=402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/categories?post=402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/tags?post=402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}