{"common":{"save":0,"post_id":"7299","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7503","mon_id":"1158767","chapter_id":"1159256","post_id":"7299","question":"<p>G\u1ecdi G l&agrave; tr\u1ecdng t&acirc;m c\u1ee7a tam gi&aacute;c \u0111\u1ec1u ABC c&oacute; c\u1ea1nh 3 cm. T&iacute;nh \u0111\u1ed9 d&agrave;i c\u1ee7a vect\u01a1 t\u1ed5ng&nbsp;<span class=\"math-tex\">$\\overrightarrow{GB}+\\overrightarrow{GC}$<\/span>.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2\\sqrt{3}}{3}$<\/span> cm","<strong>B.<\/strong> <span class=\"math-tex\">$\\sqrt{2}$<\/span> cm","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{2\\sqrt{3}}{2}$<\/span> cm","<strong>D.<\/strong> <span class=\"math-tex\">$\\sqrt{3}$<\/span> cm"],"correct":"4","level":"2","hint":"","answer":"<p><span class=\"svgedit\"><svg height=\"210\" width=\"230\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g>&lt;title&gt;&lt;\/title><rect fill=\"#fff\" height=\"212\" id=\"canvas_background\" width=\"232\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>&lt;title&gt;&lt;\/title><image height=\"211\" id=\"svg_1\" width=\"257\" x=\"-32.5\" 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KkcnvDhdBOD779fJTAZE9b33Jmq5sYWKgANhh5o+fZP53\/\/tLQ\/siy+OMfv2ZV+34ATcIAIs+saNp4ioUneBw1VREXAk1AcwWQc\/AG2zJk\/e4PgpO24QAVi6dLccrXAS3nZbH60r8KAi4DAIX9EQg5Ag6cGffTY95N2D84JbRIBqzxYtZslAU6ys2Nhk6070oiLgMHBgPfPMCHlAqROgbNgNDqx0Edht\/crZ0IiU5iOILGFXp9RghAsVAQfhtQIwVWma2b69M6oEfWH8+LWmYcMfrF85H9KwadCaXpKdIElF0YqKgIOgSrBWrcFiBVStmuDZXTeHrFlJoCQlrTXvvON8EcDfkpa239x\/\/7fmmms6igiQhzF16qaoDRmqCDgEOgaR0ooAFC4cK5GB115Lkko4jghOdww6XQRoBU\/eRdOmU03NmoPM2rUHzIEDJ8+lY1eu3Nds3x6dY8xUBBwCC71IkXZyTqU+YM+eE9JM9O23vzcffTTFjBix2tFxbaeKAJbUzz\/vN\/HxS+SzZFBJxq7QjC6j3LhIkbbiMMypj2SkoiLgADiPsoDYkdiZBgxYYd1JTx3GQqAevnnzWZL+6kScKAIcr+gqxOfGkBbGmZ8Pw1oeeih9gtPtt\/cxc+Zste5EDyoCDiA1dYfkBHA99dTwLJtfUBvfvftCExubIjkE\/Bkn4TQR8O78cXGpZu7c7dlWDnIMwxmLk5CZBf\/3fz+6IiRrJyoCYYZwFc5AHFQ4qnILs+3de8IMHLhSBo+2bj0nbFOHzscpIsCAUqIUH3wwyYwdm+Yx73Mfy8YxC2Gl50CpUp3NkCGkaEePl1BFIMz0779MdiHM0Vat5liv5gzHhw0bDsqfff75kVJXwFyEcBJuEeCc\/\/XXs81LL42VGgF\/nHxEBRhjVq5cek\/CRx8dLBGEaEFFIIzQ5eaee\/p5rIAW0jrM32GmHBuYeoTj8IEHBogwhItwigCLnp4LvXsvNrt2Hc9TWBXfACPemVyUP38r06\/fsrALa6hQEQgjn346TeYIsvswOSevcK7FDP7HP3p4TOGJYYl3+yICvC\/O21g8113XxRQq1Nr861\/fypmcXZwYvj8QQWnQ4Hvz7LMjRAwD\/XfTbMSbrXnjjd1sHx\/nVFQEwgR59nfdlSC+gCpV4m0pE\/bmGpQt28306rVIFkmoWmnlJgKY5y+8MEoWfvoE5WOy+\/Ie6faDGPg6O3DPnuNm2rSNMpGZEJ+d49g5WpUo0VmE4KuvZmUKJ0YqKgJhAGcgjiu80fgDqGyzEyIJjRpNNv\/972jp\/ReK3PicRGDZst3SIBVTG+\/7+YLHDjxlysZcFzOmPlGR\/\/xnlHn11XHm+HH7FyiNW\/jsOBKQO7Bw4U7rTuSiIhBi2JmpY69Ysad4o+vXn2COHPHPDPYF\/p5Vq\/Z6fv542dEmTFgrO2iwmDp1Y5YigEl9\/fVdLYfbkGzP6zlZLZT7UkjVpk2y9FYg2w+rJ1ggSJUq9RZfDYIT6c1HVARCzM6dx8wbbyTJMaBs2a5BH5jJ7spDTbps69bJ4kQLxhCOtWsPZikCr7wyViwARCAtDx53rAjCd+zO48atCUmLNcQIwSGDk\/fNkSOSUREIIeyCDMC45ppOchQgTTUUTS3YNI8c+UX+boSASUYsLjshf+F8Edi374QUQrGQsAa8uzcOwPnzd4j14L22bTuaaXdnAnSfPktEvMj248gQzN3\/fHA0ErkhjfvqqzuKpRKpqAiEkE2bDp2rEiSkZbcvIDdYRCw2kmg+\/HCSee+9H207imQlAmvW7D\/XIi1jWTSWCO+BsOYtt\/Q0iYnLzIEDp0Ss2IWJFrzxxnjTrdsCOZOHa3wYo97wC\/D+GzSY4JqKTn9REQgRPEDk\/WMBMASD3S1cDzfZcOysEyask8QY2poHSlYikOYx\/70iQL+BjIwZkyYWEfeolESg2P0ffniQmP6LF+8Me+svHKxPPjlUjm7FinUw06Ztsu5EFioCIWLz5sMSe+ahJxaNuRluEKZNmw7LLs2uPHv2FuuO\/2QlAvz8++5LH5yCYzIjZDvSOIV8gblzt5n33\/\/RlCzZWZyZHF1CaPnnCA1eiWxwLGAGJEVJkYaKQAjAxE1IWCqLgSrB+Pil1h1nwC6Mj+Cxx4Z4FuMkieH7e\/7OSgQgIWGJtPAqUybOeLv3kDBE7QOfR4UKPUypUnFy9ndqTJ725OnWQHupSnSKQNmFikAIYNdn6AU7HyEufzPjQgVpsv37L5fEHTzxWC++kp0IIIB1646WXZ5BKlgeWAX0T8T7jvCQOJVdeNAJ8N5uvTX9WHP33YkRV1egIhBkqGIjMYgHiJDg+PFrrDvOhTAcST0PPjjAzJmzRZpy5EZ2IgAsonXrDsowldKl42RHxTFKdqNbmnjQSBVfDj4drCV\/6zycjIpAkGGICEknPDyUuDp5xzsfdu0XXxxtmjSZIuKVk2WQkwgATjZKdBEXQqMUT4Uy5BcoJAy9+eYE8Q0wxoywppu+y5xQEQgihw6dMjVrpnetufvuBFfuHqT4MtWXM\/sXX8wQL39WXntSeqkJyAoiATRD+eKL6WbmzC2uDLWx4Bcs2GHKlesmok7J8rZtkdGqXEUgSBCGa9s2xRQo0FrSg+l041bYsInjE8pDDLBoiN97awDat2\/v2SUbmmuuqSH\/v3ZteiSA38MkZbLviAaEKyRqF9R88J0WLNjaFC\/e0VXHmZxQEQgS5LcTI\/emBzvVGegP7IbkF5DoQyyfsF7duq+ZckWKmOGXXmqGXXSRaeH5\/1q1njD16vWUY8TgwSslVTpSPOpMM65RI31S9L\/\/\/V1EOAlVBIIAVgCNPugVQESA4pdIgn8f2Y9ffNHb3FD4CrM6Jsb8Zl37PdfHl+Yz777bzKxbdyDiGnPw7+nTZ7FkEtKluEuXVEePjPcFFYEgQPILziN2C5JlIsWBdD516jxn+nssAM8\/NNOV4Lk+avCW2bt3r\/U7IwvmFZBGnD7GrK1ZtmyPqy0dFQGbwWn28stj5QEhpIQpHIng2X\/sscfMqEsuuUAERnmuVvXrmz17IrczDw7S8uW\/8fxzm0u5MdEPt6IiYCPs+NQHkB7s7RUQSfHkjLAb1q3b0Nx6WX6zPYMAnPBczS++xDRu1Mxs2HAgYod5cCRiFgSOXwTfzUc+FQEboYXWyy+PEWcg\/f7o+xdp4OCkB0KzZjNNrVoDzb331jQ1ihUzMzyLf7bniitQwPyrSjWPldDSPP74EHEMMvQjUhyDGaEKlBZxiADfNxEUN6IiYBOEvwgDFi3aXkJIFOX42jPPDbDzIWqU97777kRpToJD7OTJk6Z79+6m9hPPmJJX3WkaNWpkFi5cKOFD8gvoXUBYkd59kTYCHGGj4UjRounNR1q2nO1K\/4+KgA3wMDDs0hs6YqyVL6m2boGqvr59l5ivvpppOneeL\/+28x\/2dev2mDvv7GXOnMnsKaezEbUCdAciv2DgwBURdUSiHwMDTrEGqI9Yvjy0PSLsQEXABqh+Y3GQGsyYayyCSDgLI27Dh6+WXHlGoFFqnN1EH5qVYBpnB44zjgbt2qVIVd7kyRvEuRgJMDiWSknGyNWtO8p1OSEqAgHCc7x69T5xBrIb8BBs2eJ79Z1ToY6eXojkO9AYlWy5nMhNBIDPipZjtDmj+SlzFyIh2QarqHHjKWIFcjTo2TPvMyTCgYpAgOALoCgGZyB99CiScXNeAGf59u1TpOZhypQNUhPgy7\/HFxHwQu0ATtRhw1ZLW\/QePRa63n+CaNKLkI2A3oRucgqrCAQIvgDCRPSpx2Hm1vx4dmkq40hu4mhDlZ8\/YoYIVKuWaP3KNxAD8iioKqxWLUG6CrkZLBysATJFsXLcUiilIhAALJJ\/\/jNRvvgKFXoG1J4rXLDzb9hwSM7pTAhauZLsN\/8tmbyIQEboZkTDDnoMknDl7ULkJoiW8P6xCu+8M96kpGwTcXU6KgJ5hC+XszICQEiQI4HbjgH0C8BZV6PGAAlpBpIDH6gIeElO3irCijVC\/wI35eXzTBAWxTlMshipxRwTnI6KQB6hiQYz\/6gtv+OOvrKg3AIPJhluzz03UhqBkP0XKHaJABB2o5cfg0vozUixkltMaxqRsiHky9dSnMUcEZz+3lUE8gBfKnXlfNEM2GT4pxs4deqMtM3u1Gm+pDQjBCQB2YGdIgBYVfhbmFbcvPksM2jQSlfsqsDoNXwcWIk0WqG1mpOPBSoCeYBzs7d9ODXlwZglaCcsKBp8dOw4T5J2OALYPV\/PbhHwQukuDkvGmSMINCdxur+AnIjevRefyx6l9NjJBUYqAn7C4nn77e8lIsBFI04ng5cfS4Vcfyb9cGwJhu8iWCLgBd8AHZDj4lIlCkMWopN3V5ytzz8\/UkKGlSv3NatX73Xs+1UR8JMfflh3zgrApHaqMxCvP30NOFdzdKEjTjCzGIMtAsAiYmYBZbwcET78cLJjw4ocGckZIXcEIWjUaJJjnZwqAn5AthtzA\/AFFC\/ewbGZgTxsvE9m+FPxR8gt2Cm6oRABL\/gxGLNOmzMafpKK7MQjGVmWOAlJJ7\/iirYmJWWrdcdZqAj4Qb9+y2SCEFZAr16LHef1xSph1y9VqrOcozmHhsoERQTIGAxlPQBiQJSG8Ob9938r9Qh2OTrtAucrQ1d5Zug56cSaEhUBH8HDW7v2MPkySQxyUlksWYpM8mVyELn+hw+HfldMF4HEsJx7Eb+1aw9Khx+6OtEM1Um9DT\/+eJpkEfLsUFIdjs8oJ1QEfIBFxuRe2oUVLtxGvkgnPGSE\/OhqzDyAJ54YKn3xw+WjCKcIeMEPMnHievPww4Olzh\/hdsL3xLRlBBrfAAVG5D04CRWBXOChpoMMY7P4ErEG6JQTTjiG8IBTm9+gwfcmMXFp2MtXnSACXvgsyDikOGnEiJ\/EKRruYwIbB+PXeIbefHO8o44FKgK5wANFfJqBoiVKdJIMsHA+ULSwIs5Pg4\/Y2GSpVnNChMJJIuBl165j5rPPpssRCcHEagrX+0O4OapwJCCtmM5MTkFFIAdYXKmpjJ7qLj3myQXfseOodTe08F4ovW3SZKqM9GJAJscBp+BEEQA6G82fv920bp0s7b\/IPMSZGA6I1FxzTUdpPkKhEeXUTkBFIAeocX\/99SSpD8DDS8FQOB5y0mfZ0ehuO2zYKkd2rnGqCADviSQvhLN16znyOU6cuC7k0R2EnB6NiMBVV7U3cXHzHRHNUBHIARKDCheONYUKtZEHJ9SxaOL7nTrNkyIf2nzhUHKC6Z8VThYBL3x2ZFDSLAVxZ8rwli2hjfLwnVJmjG8AZyFVh+FGRSAb6KVXpUpfOcPx3yVLdll3gg87FDHvOnVGSL4\/Z1knhbyywg0i4IUoAs1MyKWgKewnn0wLWTYfn8+cOVulpqBAgVayuYS7q5KKQDYkJa2VYwCZXpwlQ5UEw3n1vfcY9DnarFix1\/GL34ubRMALlgE7c0LCEikHHzp0dUjMc45zH3wwSTaYG27oKpmP4URFIAtYiCR3YLLR7QYTMpiwcHgwyImnvdd3361wVTMNcKMIeEEM0tL2y5RlUq0XLdopuSHB+rfwcxct2mVKl44TISDFO5zJZyoC50GZqrdxKFZA\/\/7LrTv2w8NAIgkP3X\/\/S67\/WNfUzJ+Pm0XAC0dAMi\/5LsgzoDgpuxbrgYKjskOHuXIkKFKknfn22+Vhs\/pUBM6DrDu6xqLQtWoNDtoXw0APQlfkvWP6z5+\/w7rjTiJBBLzQHQgvPiXjVAIGKxOT8uJHHkkfXPLAAwOscuPQf4AqAhnA+1+v3njpHEyKMKW4dsOZkzkF7DQffjhJMsl46NwOjjZEMxJEwAuRA0qW33rre88RbbntbcRxAJP4VaZMnIQN27RJDssxUEXAAqXnCylRorNYAdR\/2+0kIttvwIAV5vPPp0uMGDEIdaw6WOBHIYU5kkQAeAawBEg2IoqA2Y7VYxfMdXjjjfHmsstamptu6m4WL94V8s9QRcCC3gAU4aDIpUrFyc5mF5h4kyatF48w\/f3oqMvoskgCEXjnnYkRJwJeOMPTn5FUbTob4cS14zvk8yIc7C03Jiwc6tkVKgIeSC3t2HGuZHHly\/e1dLi162HGpCQphcm806ZtFEdgJC6USBcBwFqkscz06Zvk+ySJi+KkQP0FHAGY3swRlAYkJIaFEhUBD3yRJI0QEahaNcEWKwAznxRVeuiTecjid0KKaLCIBhHwwvfIv5c0cioVad4aqFVAQhi5CjyDhA5DmUAU9SLAl4fzhwIhsrhQ+UCVnUw0UkK7dEk1Bw+y80f+yogmEfDC94qfhwGkNJoJZAfnc6OJKtYAxwIakYSKqBYBvkRGRaHAhGloHErvurzAkYJOvjT4qFNnpIT\/SE+NFqJRBDKCT4njwbPPjpQUczYXfz8LrEcGwWINFCvWwSxYsDMkn2dUiwCTd6g1Z2TUddd1kR3c310b05BxWSNH\/iT14j16LJJU1Ggj2kUAsCCTk7eZunXHSA8Kjpn+znegMxLWAP0rHn98aEiepagVAXZpqsmIBOCMIUvQ3\/Rg4vv0v2\/SZIo0+Vi3zhkNPsKBisCfkG9CXgFRhPj4pdKZyp9OQvw5LFOS1ghJBtuXFLUigJeXTD2KhHAGErbzFbIIveEivMTpnX0jK+TnL3v3Hvd8nokeUZzg0zV+\/HiTlpbmt+XlFtgMNmw4KH4hnpG+fZfIcdEXENSKFXvJs3nPPf2kn0QwiUoR4AvCfMfsKlKkrYy48iVTiz+HqpPq++WXs6QFeTSa\/lmBCNSq1cE0avS5xxT+OtMVGxtrevXqZXr37n3uatq0qUlMTPTscu6okswr+IpINkIM6AqFE5F5BLlBurL3+cRxHcxNJipFgIWbHo5pIVV7vjR2oF8dXyBZYxQVpQ+ZVNvXC7vXf\/4z1EyfvsLs2LEj07V7925z9OjRTNeYMWNEBM6edV4f\/mDAJkPkiWnLDRtOlHTxnOYT8ozSQh0n4W239ZY\/GyyiUgTY+XEG4oElfRe1zg48tjSBoMSUP7ds2e4cv7xoBRFgGhCp0L4wadIkj5j2jxoR8ELJ+KxZmyWHhGgU0ams\/Ei8xnNHzgApxRQzkWIcDKJOBGjuyLRY0oMfe2yIxHmzgwSf118fJwKASccXmNUXpqgI+APPEM8dyUZvv\/2DOJWzajrK80ZDG55VOhQPGbJSNiW7iToRePHF0ZKMQYrwmDHZd3Sh0Kd8+W\/EOxusmvJIQkXAfzhNIgY9eiw0NWp8J8lG55eu02vi9tv7yDPLlONgzL+MGhHgA6c0GGcL4ZcXXhiV6RjA+Z6YLgkaTz01XMI0e\/aEpzW1G8mLCCQkJHgE1nmdk8MBo8zr1x8vz+WKFXskbZhnlp2f4TLe3AHyUOwuMIoaEWCkNY0bEABMKz5oLydO\/Cpnfc789BPwJ1yopJMXEWjevLnZts3+ng1uhQXPs1e79lCpR+CZJOeALtMvvDBajgWkJ\/Ps2umTjgoRIDEoMXGZLH5EoFmzGfI6HzrDK1Fadn6m1CAWdn7A0YKKgH1goRIixHHYq9cis3jxTnk2y5XrJscCEtvsbD4SFSLAQmeWICHBSpV6yQNLyjAfNE4ZxnmT4hkMp0u0oCJgLxxPaT6KCLBp0XWI8esUul15ZTtbQ4YRLwIoJl1hiAjwAQ4cuFJKe5no07ZtsmT7+ZK8oeSMioD\/ECUgVR3zPruLTkM4qek+dOutvTzP8Kcea+Ax88Tdz0vSlR0+lYgWgRMnTngW\/FxTtWo7jxXQTJIuMLE+\/XS6DBblwVUuhB0IrzRhUV+u1NTtpmP7zua2m\/5t6tV7zyQlzcry982bt02yLLt2pYlnF\/PII\/VMixbj5deBXvRspILzo48m235hfj\/33Ejbr2efHSFVg7S1z+2qWLGntMGPiXnGNIgpYsbHxJj6JUualJQU61vLOxErAocPHzY9Onc2r5Qrb6r8pYy5JOYlc9VVbaXck+IOLICZMzeLWdW\/\/zLPrjQzKBdjqF96aYztF22oOOJUq5Zg+8WR6eabv\/Fc3X27bupuql11lVl88cWmS8GCpkyZ2ln+vps8v4+iGMKzf\/vbG6ZgwQc9pu1n8utALyy9woXbSE8Iuy8KzDiLO+N60CTG\/MWc9YjAJ\/nzm1GjRllPfNYwQJcwN88iHZSx1GhgknEDjFgRSJ03z3x4ww1mrefDmhhzkSkfc6vHGmgioZaiRdtlungtqy\/fjotsr3z57L\/wFJNSmvWDEvrr757P2fM\/ZrTnuiim6gX3L7y+8FyYtl9meC28FxmkNWoM8Fgog22\/qBvo0mW+x2pJDehq126U+XfJ682bns+5YrFinsW813riM0Ox0iuvjDWlS3eWY+\/MmVukbR4FSbQ5zzhWz9EiQKkucVEy9jLugnjyGRKR00yA5DlzzFtXX222eT6seZ6rUszfPYumsSwcN13sQtQ3PP30MNsvPkvOm3ZcL9d91dx40UWm2g3lPLtOvMfS2pTlGdeOK9qjN5s2bRILgJqMrKDC9cYbu8nxIeNixweB1cvxJuMgVsdbAvT7K148fRgIjqekpDWmfPkeMikYr352iRPHjx83CfHxpsYtt5ialSubtm36ez6cDWIO\/fzzflsvzCtCi9EM3uyTJ09q8k8Yoe8Ax1yOc0w2GjHiJ+vOnyAKiETG+hfHi8Ds2VvEZCe+P27cGsnnZ2YcovDkk8NkAeYEFWs4CBUl0iHr8KmnhslawWeU1Sh9Fv\/5ZcmOFwHio4UKtZZEn6NHT0ujhgcfHCCv0RpMPfyKkg7lyXTKwmc0bNhqw1xNX3C0CFC48+ijQyRnunr1\/mbhwh2mRYtZ0gsAvwANPrSmX1HSu12R9o4jmnHn\/vhOHC0CaWn7z01mwZlBdt\/113cRRyEZfioAipIOVnKjRpNlrRDhoPmtrzhaBMjpxylICG\/Vqn3i1CDZp2zZrpJKmdf24IoSaeAgZ5NkghZ9MrZt+9P7nxuOFQHy+JkGS4js\/vu\/k12f1+gNiNoFu+WSorgJ1gc+gTJlukhCVmrqjkyWMscFwoJZbZyOFYGNGw\/JFB8WfLduqfIabZu7d18gr1FSSWcWJXwQHmX3adp0ilz4a+jZgLOW9GC67HrvUaylXZmCy759J6UNGUlqJAV5S+IplqM\/5qBBK7PMrXGsCIwdu8aUK9fd5M\/fSuqqeYA457D4yZZ7442kiJjr73ZSUraLKHNkIyPNCyLO2ZR7NNbUCs3QQDMS0oRJMMOK5nhAUti8edut33EhjhQBYpktW86RJosUTlBLTd92LIMyZeJEADZutL\/NkuI\/dF9mofNdZUxAGTs2TWoFiFkvWUIUx7qhOA5HigB5z5T78iBlvJgJT6tv3VWcgzd6c99931qvpMMYLnaikiU7Z0pRVZyHY48DivOhNz5OKGoc8AF4wVNNSNd7FNABLc5GRUDJM\/HxS6R8FxEgnDtixGq5cN5WrRovIoD1FuxZekpgqAgoeYIzvrdxK\/4AFrv3wkON85Y2WDk5pBRnoCKg5An65Veq1Ft2e87\/XvDXMKsR6+Dpp4f7lbmmhAcVASVPMLgFpx\/NWzOGamnqyuJHHGiSmdOIN8UZqAgofkMmGvUbxKCvuCLWejWdyZM3SMUnkYGs6tkV56EioPjN7t0nTM2ag+TcX716v3OZgGSjkahCKSuJXjS4UJyPioDiFyx0Gr0QDfBelHTzenLytkyv08GG0W6Ks1ERUJQoR0VAUaIcFQFFiXJUBBQlylERUJSoxpj\/B5rA8C+IZKamAAAAAElFTkSuQmCC\" y=\"-4.5\"><\/image> <line fill=\"none\" id=\"svg_2\" stroke=\"#ff0000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"113.5\" x2=\"116.5\" y1=\"26.5\" y2=\"180.5\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_3\" stroke=\"#ff0000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"27.5\" x2=\"159.5\" y1=\"180.5\" y2=\"102.5\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_4\" stroke=\"#ff0000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"205.5\" x2=\"68.5\" y1=\"178.5\" y2=\"102.5\"><\/line> <rect fill=\"none\" fill-opacity=\"null\" height=\"11\" id=\"svg_5\" stroke=\"#ff0000\" stroke-width=\"1.5\" width=\"11\" x=\"116.5\" y=\"169.5\"><\/rect> <\/g> <\/svg><\/span><\/p><p>V&igrave; G l&agrave; tr\u1ecdng t&acirc;m c\u1ee7a tam gi&aacute;c ABC n&ecirc;n ta c&oacute;&nbsp;<span class=\"math-tex\">$\\overrightarrow{GA}+\\overrightarrow{GB}+\\overrightarrow{GC}=\\overrightarrow{0}$<\/span>.<\/p><p>Suy ra&nbsp;<span class=\"math-tex\">$\\overrightarrow{GB}+\\overrightarrow{GC}=-\\overrightarrow{GA}$<\/span><\/p><p>&rArr;&nbsp;<span class=\"math-tex\">$|\\overrightarrow{GB}+\\overrightarrow{GC}|=|-\\overrightarrow{GA}|=GA$<\/span>.<\/p><p>M\u1eb7t kh&aacute;c trong tam gi&aacute;c \u0111\u1ec1u ABC th&igrave;&nbsp;<span class=\"math-tex\">$AH=AC.\\sin C=3.\\sin60^0=\\dfrac{3\\sqrt{3}}{2}$<\/span>&nbsp;cm.<\/p><p>Do \u0111&oacute;&nbsp;<span class=\"math-tex\">$|\\overrightarrow{GB}+\\overrightarrow{GC}|=GA=\\dfrac{2}{3}.AH=\\dfrac{2}{3}.\\dfrac{3\\sqrt{3}}{2}=\\sqrt{3}$<\/span>&nbsp;cm.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;<span class=\"math-tex\">$\\sqrt{3}$<\/span>&nbsp;cm.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-04-14 03:29:52","option_type":"math","len":0},{"id":"7505","mon_id":"1158767","chapter_id":"1159256","post_id":"7299","question":"<p>Cho 5 \u0111i\u1ec3m M, N, P, Q t&ugrave;y &yacute;. T&igrave;m vect\u01a1&nbsp;<span class=\"math-tex\">$\\overrightarrow{u}=\\overrightarrow{MN}+\\overrightarrow{RN}-\\overrightarrow{QP}+\\overrightarrow{QR}-\\overrightarrow{PN}$<\/span>.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\overrightarrow{u}=\\overrightarrow{MR}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\overrightarrow{u}=\\overrightarrow{MP}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\overrightarrow{u}=\\overrightarrow{0}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\overrightarrow{u}=\\overrightarrow{MN}$<\/span>"],"correct":"4","level":"2","hint":"","answer":"<p><span class=\"math-tex\">$\\overrightarrow{u}=\\overrightarrow{MN}+\\overrightarrow{RN}-\\overrightarrow{QP}+\\overrightarrow{QR}-\\overrightarrow{PN}$<\/span><\/p><p><span class=\"math-tex\">$=\u200b\u200b\\overrightarrow{MN}+\\overrightarrow{RN}+\\overrightarrow{PQ}+\\overrightarrow{QR}+\\overrightarrow{NP}$<\/span><\/p><p><span class=\"math-tex\">$=\\overrightarrow{MN}+\\overrightarrow{RN}+\\overrightarrow{NP}+\u200b\u200b\\overrightarrow{PQ}+\\overrightarrow{QR}$<\/span><\/p><p><span class=\"math-tex\">$=\\overrightarrow{MN}+\\overrightarrow{0}$<\/span><\/p><p><span class=\"math-tex\">$=\\overrightarrow{MN}$<\/span>.<\/p><p>Ch\u1ecdn<span style=\"color:#16a085;\">&nbsp;<strong>D.<\/strong>&nbsp;<span class=\"math-tex\">$\\overrightarrow{u}=\\overrightarrow{MN}$<\/span>.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-04-14 03:39:18","option_type":"math","len":0},{"id":"7507","mon_id":"1158767","chapter_id":"1159256","post_id":"7299","question":"<p>Cho h&igrave;nh vu&ocirc;ng ABCD c&oacute; c\u1ea1nh b\u1eb1ng a. T&igrave;m \u0111\u1ed9 d&agrave;i c\u1ee7a vect\u01a1 t\u1ed5ng&nbsp;<span class=\"math-tex\">$\\overrightarrow{AB}+\\overrightarrow{AD}$<\/span>&nbsp;?<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$2a$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$a\\sqrt{2}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{a\\sqrt{2}}{2}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$a$<\/span>"],"correct":"2","level":"2","hint":"","answer":"<p><span class=\"svgedit\"><svg height=\"210\" width=\"210\"> <g>&lt;title&gt;&lt;\/title><rect fill=\"#fff\" height=\"212\" id=\"canvas_background\" width=\"212\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>&lt;title&gt;&lt;\/title><g id=\"svg_8\"> <g id=\"svg_3\"> <rect fill=\"#fff\" height=\"160\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"160\" x=\"24.5\" y=\"25.25\"><\/rect> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"184.5\" x2=\"24.5\" y1=\"25.25\" y2=\"185.25\"><\/line> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"&rsquo;Times New Roman&rsquo;, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"5.5\" xml:space=\"preserve\" y=\"196.25\">A<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"&rsquo;Times New Roman&rsquo;, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"6.5\" xml:space=\"preserve\" y=\"26.25\">B<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"&rsquo;Times New Roman&rsquo;, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"186.5\" xml:space=\"preserve\" y=\"26.25\">C<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"&rsquo;Times New Roman&rsquo;, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"188.5\" xml:space=\"preserve\" y=\"193.25\">D<\/text> <\/g> <\/g> <\/svg><\/span><\/p><p>Ta c&oacute;&nbsp;<span class=\"math-tex\">$|\\overrightarrow{AB}+\\overrightarrow{AD}|=|\\overrightarrow{AC}|=AC=a\\sqrt{2}$<\/span>.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong>&nbsp;<span class=\"math-tex\">$a\\sqrt{2}$<\/span>.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-04-14 03:44:28","option_type":"math","len":0}]}