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by sourav das
Thu Dec 23, 2010 10:29 am
Forum: Divisional Math Olympiad
Topic: Problems on Number Theory and Alzebra (frm BdMO)
Replies: 14
Views: 5623

Re: Problems on Number Theory and Alzebra (frm BdMO)

If 'a' and 'b' is natural number hoi tahola qestion 4 ar choto somadhan ache. 3^a - 1=7^b . but, 3^a - 1 is divide by 2, and 7^b is not divided by 2.
Am i right?