In a triangle ABC, D and E are points on sides AB and AC respectively such that, DE||BC. Then ADAB =.

In a triangle ABC, D and E are points on sides AB and AC respectively

1.	In a triangle ABC, D and E are points on sides AB and AC respectively such that, DE\|\|BC. Then ADAB =.
Answer» In a triangle ABC, D and E are points on sides AB and AC respectively such that, DE\|\|BC. Then $\frac{A D}{A B}$ =.