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# C2 exam question Watch

1. Could someone explain q ) 8 iv for me? Looked at the mark scheme and don't understand it.

2. Consider an arbitrary point on the x axis where with co-ordinates (C,0) . Draw the line with equation x=c. You'll notice x=c intersects both curves at 2 points. The question is basically saying that the distance between these points is 4 units. So the difference between the y values is 4 units. this implies that log2C-log2(C-3) =4.

This means that log2[C/(C-3)]=4 so 2^4 =[C/(C-3)] this eventually leads to C= 48/15 = 16/3
3. (Original post by eggfriedrice)
Could someone explain q ) 8 iv for me? Looked at the mark scheme and don't understand it.

what paper is this ?
4. (Original post by hecandothatfromran)
Consider an arbitrary point on the x axis where with co-ordinates (C,0) . Draw the line with equation x=c. You'll notice x=c intersects both curves at 2 points. The question is basically saying that the distance between these points is 4 units. So the difference between the y values is 4 units. this implies that log2C-log2(C-3) =4.

This means that log2[C/(C-3)]=4 so 2^4 =[C/(C-3)] this eventually leads to C= 48/15 = 16/3
Got it, thanks.

(Original post by yoitsro)
what paper is this ?

OCR Jan 2013

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