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Grade: 12

                        

no. of integeral solutions of x 2 +y 2 =2008

10 years ago

Answers : (1)

mycroft holmes
272 Points
							

x2+y2 = 8X251 and 251 is a prime of the form 4k+3.

 

There is a result that states that if x2+y2 is divisible by a prime p of the form 4k+3, then both x and y are divisible by p.

 

But that means LHS is divisible by 2512 whereas RHS is divisible at most by 251 which is a contradiction.

 

Hence no integral solutions exist

10 years ago
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