For question 17 what I done was: Make a = x+2 b = x+1 and c = x so a>b>c is true Then I set up the expression: 100(x+2)+10(x+1)+x, to make the biggest integer (N) This gave me the expression: 111x+210
Then I set up the expression: 100(x)+10(x+1)+x+2, to make the smallest integer (K) This gave me : 111x+12
Then I did: 111x+210-(111x+12) which is equal to 198, 198 is a multiple of 99 (2*99) Hope this helped for quest 17, not that great at explaining things
For question 17 what I done was: Make a = x+2 b = x+1 and c = x so a>b>c is true Then I set up the expression: 100(x+2)+10(x+1)+x, to make the biggest integer (N) - for example: if c = 2,100(2+2)+10(2+1)+2 which is 432 hence a= 4, b = 3 and c = 2 This gave me the expression: 111x+210
Then I set up the expression: 100(x)+10(x+1)+x+2, to make the smallest integer (K) This gave me : 111x+12
Then I did: 111x+210-(111x+12) which is equal to 198, 198 is a multiple of 99 (2*99) Hope this helped for quest 17, not that great at explaining things
I don't think this is right, you don't know that a=x+2
Only assume that they're consecutive if it tells you to. Even if you can't complete the proof without assuming that the numbers are consecutive, it will still get you more marks. (from what I've seen, anyway)
Thanks again for your help everyone. I've been trying to answer this question but am not sure how to answer it because I haven't seen one like it anywhere. My answer is a+ 4*root ab -4b but I think it's wrong. Does anyone know how to do it?
Thanks again for your help everyone. I've been trying to answer this question but am not sure how to answer it because I haven't seen one like it anywhere. My answer is a+ 4*root ab -4b but I think it's wrong. Does anyone know how to do it?
I'm going through the questions I got wrong in a practice paper we did at school so that I know how to answer them just in case a similar question comes up in the exam.
I'm going through the questions I got wrong in a practice paper we did at school so that I know how to answer them just in case a similar question comes up in the exam.