Recover with level 1's

Hello all.
please give me some comments about this.
I have one level 0 backup and then i was doing each week incremental level 1 .
Now i have one level 0 that's old alsmost two months and several leve 1.
If i did level 1 today and a week ago level 1 also and i want to do point in time recovery of the database as it was 3 days ago, do i still need that level 0 that was old almost two months or i will need only last level1 and necesary archive logs and eventually level 1 before the last level 1 ?

Yes, you definitely need level 0 backup to recover. I advise you to change your backup strategy.
Please see the below link for complete information on backup strategy and incremental backups.
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/bkup004.htm
Hope this helps,
Regards
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