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Mathematical proof

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The process of starting with an assumption, or a statement which is given, and, by using logical argument, arriving at a conclusion …

The process of starting with an assumption, or a statement which is given, and, by using logical argument, arriving at a conclusion

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  • 1. CORE 1CORE 1pROOfpROOf
  • 2. What is Mathematical Proof?What is Mathematical Proof?The process of starting with anassumption, or a statement which isgiven, and, by using logical argument,arriving at a conclusion
  • 3. Mathematical ProofMathematical Proof‘Prove that …’ or ‘Given …, prove …’ or ‘ Prove …, given …’Form a logical argumentStart with what is given or standard resultsDeduce each step from previousStandard results can be used at any stage
  • 4. MATHEMATICALMATHEMATICALSTATEMENTSSTATEMENTSΔABC is isoscelessinθ = ¾The gradient of y=mx+c is m
  • 5. Use to express the relationship between statementsimpliesdoes not implyis implied byimplies and is implied byImplication SignsImplication Signs
  • 6. Example:Example:Prove that ΔABC is isoscelesAB = AC‗B = _CAB = AC ΔABC is isoscelesAB C
  • 7. Example:Example:Link the statements a = 0 and ab = 0 using implication signs.a = 0 ab = 0ab = 0 a = 0 (b could be 0)ab = 0 Either a = 0 or b = 0
  • 8. Example:Example:
  • 9. Example:Example:Prove that sum of an even numberand an odd number is always odd.
  • 10. Let 2n be any even number, where n is an integer.2m + 1 be any odd number, where m is an integer.2n + 2m + 1 = 2(n+m) + 1n+m is an integern+m is an integer2(n+m) is even2(n+m) + 1 is odd2(n+m) + 1 = 2n + 2m + 1the sum of an even number and an odd number isalways odd.
  • 11. This powerpoint was kindly donated towww.worldofteaching.comhttp://www.worldofteaching.com is home to over athousand powerpoints submitted by teachers. This is acompletely free site and requires no registration. Pleasevisit and I hope it will help in your teaching.

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