nguyenhoaibaotran210 nguyenhoaibaotran210

02-11-2021
Mathematics

contestada

cho tam giác abc có trọng tâm g. Gọi h là điểm đối xứng của g qua b. Cm: vtHA -5vt HB +vt HC=vt 0

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adrianjaydapat23 adrianjaydapat23

02-11-2021

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