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CBSE - X - Mathematics

plzzz tell fast for tomorrow's boards

Asked by ashwinivg 10th March 2010, 8:44 PM
Answered by Expert

Answer:

6q+5

=3(2q+1)+2

=3p+2 for some pso first part is proved.

now we have to prove that ,

if a positive integer is of the form 3q+2 then it's not of the type 6p+5 for some integer  p

3q+2=6[(q/2)-(1/2)]+5

but the quantity inside the bracket is not always an integer, hence the answer.

 

Answered by Expert 10th March 2010, 9:55 PM

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