If D is the mid-point of side BC of ∆ABC and AB→+AC→=k AD→ , then k = ______________.

If D is the mid-point of side BC of ∆ABC and AB→+AC→=k AD→ , t

1.	If D is the mid-point of side BC of ∆ABC and AB→+AC→=k AD→ , then k = ______________.
Answer» If D is the mid-point of side BC of $∆ A B C and \vec{A B} + \vec{A C} = k \vec{A D}$ , then k = ______________.