1)
Why, on Shemini Atzeres, does one bring only one bull and one ram?
1.
Rashi: Because they represent Yisrael (Hashem's unique nation). 1
2.
Targum Yonasan): They represent the One G-d and Yisrael - the unique nation, respectively. 2
1
Whom the Navi in Shmuel 2, 7:23 calls "Goy Echad ba'Aretz".
2
Whereas the seven lambs reprsent the Simchah of the seven preceding days (Targum Yonasan).
