B
bietdanhkiemsat


trong khong gian cho he toa do OXYZ cho hai diem A(5,4,3) ,B(6,7,2) va duong thang(d1): (x-1)/2=(y-2)/3=(z-3)/1
1/ viet PT mat phang qua A va duong thang (d1)
2/ tim diem C thuoc duong thang (d1) sao cho tam giac ABC co dien tich nho nhat
1/ viet PT mat phang qua A va duong thang (d1)
2/ tim diem C thuoc duong thang (d1) sao cho tam giac ABC co dien tich nho nhat