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ABCD a parallelopram,and A(1) and B(1) a...

ABCD a parallelopram,and `A_(1)` and `B_(1)` are the midpoints of sides BC and CD, respectively. If `vec(A A_(1))+vec(AB_(1))=lambda vec(AC)` then `lambda` is equal to

A

`(1)/(2)`

B

`1`

C

`(3)/(2)`

D

`2`

Text Solution

Verified by Experts

The correct Answer is:
C
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