Div Secondary 2007/1

For discussing Olympiad Level Number Theory problems
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Div Secondary 2007/1

Unread post by Hasib » Tue Feb 01, 2011 8:18 pm

$a\text{ and }b$ are positive integers. How many solution the equation has? $3^a-7^b-1=0$
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Tahmid Hasan
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Re: Div Secondary 2007/1

Unread post by Tahmid Hasan » Tue Feb 01, 2011 10:49 pm

$odd-odd-odd=even$ is not possible.
so no soln
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