NSX Posted February 10, 2003 Posted February 10, 2003 I'm finding it hard to do geometry proofs. I can handle analytical proofs, but the vector and deductive proofs are way over my head... How do you guys approach these types of proof?
NSX Posted February 10, 2003 Author Posted February 10, 2003 Well, just really anything in particular. ie. Prove that if 25 is subtracted from the square of an odd integer greater than 5, the resulting number is always divisible by 8.
JaKiri Posted February 10, 2003 Posted February 10, 2003 Originally posted by NSX Well, just really anything in particular. ie. Prove that if 25 is subtracted from the square of an odd integer greater than 5, the resulting number is always divisible by 8. Proof by induction agogo
NSX Posted February 10, 2003 Author Posted February 10, 2003 Originally posted by MrL_JaKiri Proof by induction agogo Well, our teacher wants us to do it deductively...
lqg Posted October 16, 2003 Posted October 16, 2003 now lets try: 2n+1>5 n>2 (2n+1)^2-25/8 (2n+1+5)*(2n+1-5)/8 (2n+6)*(2n-4)/8 now n is an even number greater than 2 and 2n+6 and 2n-4 are also even numbers and their multiplication is also even when you divide even by even you get an integer from this the number given is diviseable by 8.
lqg Posted November 18, 2003 Posted November 18, 2003 no body seems to reply to this thread and to point to me that my proof is not true, thanks (-:
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