BỘ ĐỀ THI THỬ THPTQG NĂM 2018 - MÔN TOÁN - LÊ BÁ TRẦN PHƯƠNG (ĐỀ 1-9) - CÓ LỜI GIẢI CHI TIẾT
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AG 4a<br />
<br />
<br />
d AA', BC d A', BB ' C ' C 3 d G, BB ' C ' C<br />
AG BC,<br />
GM BC<br />
<br />
<br />
AGM<br />
<br />
<br />
BC<br />
GK BC, GK MM ' gt<br />
GK<br />
<br />
BB ' C ' C<br />
AA'<br />
A'<br />
G GA<br />
2 2<br />
<br />
<br />
<br />
7a<br />
3<br />
3<br />
1 a 3 2a<br />
cos A'<br />
AG MK GK <br />
7 42 7<br />
6a<br />
d AA',<br />
BC<br />
<br />
7
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