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AP and TS EAMCET Engineering 2020 Model Paper 3
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© examsnet.com
Question : 17
Total: 160
If D, E are the midpoints of
A
B
,
A
C
of
∆
A
B
C
and
D
E
=
λ
B
C
then
λ
1
2
1
2
3
Validate
Solution:
O
D
=
O
A
+
O
B
2
,
O
E
=
O
A
+
O
C
2
D
E
=
λ
B
C
D
E
−
O
D
=
λ
(
O
C
−
O
B
)
O
A
+
O
C
−
O
A
−
O
B
2
=
λ
(
O
C
−
O
B
)
λ
=
1
2
© examsnet.com
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