1)
Why does it say "Nimtza" (singular)?
1.
'Rashi' #1: There was not found the deed of beautiful women like the deed of his daughters' beauty 1 .
2.
'Rashi' #2: There are many verses like this, e.g. "va'Yhi Anashim Asher Hayu Temei'im..."
1
'Rashi' did not call this another answer, but I see no other reason that forced him to say this. (PF)
2)
Why did he give to his daughters an inheritance amidst their brothers?
1.
'Rashi': It was due to their esteem and beauty.
2.
Seforno: It was so they would marry kings of the land.
