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7^x -3^y=4 xy are positive integers find all possible integer solutions

7^x -3^y=4
xy are positive integers
find all possible integer solutions

Grade:

1 Answers

Sher Mohammad IIT Delhi
askIITians Faculty 174 Points
10 years ago
for x=1 and y=1, 7-3=4, and for greater values the function of left rises exponetially and 4xy increases linearly, so the two function can not be equal for values greater than 1,1 .

sher mohammad
b.tech, iit dlehi

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