giúp tui đi 2 năm nữa thi đại học rùi
Cho hình thang
cân
có , đáy lớn CD" role="presentation" style="font-size: 13.696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">CDCD
nằm trên đường thẳng xȡ
2;3y&
#x2212
;3=0" role="presentation" style="font-size: 13.696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
x−3y−3=0x−3y−3=0 bt
2" role="presentation" style="font-size: 1
3.
696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
22 đườn
g chéo AC" role="presentation" style="font-size: 1
3.
696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">ACAC
vuông góc vs BD" role="presentation" style="font-size: 1
3.
696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
BDBD tại
I(2;3)" role="presentation" style="font-size: 1
3.
696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
I(2;
3)I(2;
3). Vi
ết ph
ươn
g tr
ình
đường th
ẳng
ch
ứa
BC" role="presentation" style="font-size: 1
3.
696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
BC
BC bt
rằng hoành độ điểm
C" role="presentation" style="font-size: 13.696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
CC dương.
giúp tui đi 2 năm nữa thi đại học rùi
Cho hình thang
vuôn
g tại và D,CD
=2AB" role="presentation" style="font-size: 13.696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
D,CD
=2ABD,CD
=2AB có B(1;2
)" role="presentation" style="font-size: 13.696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
B(1;2)B(1;2) . Hình chiếu vuông góc hạ t
ừ D" role="presentation" style="font-size: 1
2.
8px; display: inline; line-height
: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
DDlên AC" role="presentation" style="font-size: 1
2.
8px; display: inline; line-height: normal; word-
spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">ACAC
là H(−1′0)" role="presentation" style="font-size: 1
2.
8px; display: inline; line-height
: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
H(−1′0)H(−1′0) Gọi
N" role="presentation" style="font-size: 1
2.
8px; display: inline; line-height
: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
NN là trung điểm của HC" role="presentation" style="font-size: 12
.8px;
display: inline;
li
ne-height
: normal; word-sp
acing: normal; word-wrap: normal; wh
ite-space: n
owrap; float
: none; dir
ection
: ltr; max-width
: non
e; max-heig
ht: none; min-width
: 0px; min
-heigh
t: 0px; position: rela
tive;">HCHC .Tìm toạ độ các điểm A,C
,D" role="presentation" style="font-size: 1
2.
8px; display: inline; line-height
: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
A,C
,DA,C
,D b
iết
PTĐT DN:x−2y&am
p;#x2212;2=0" role="presentation" style="font-size: 13.696px; display: inline; line-height
: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">
DN:x−2y−2=0DN:x−2y−2=0