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# C3 question help... watch

1. I hope this works...

I don't have a clue what to do :/

EDIT: SEE FURTHER DOWN
2. I love how tiny that is, give me five mintues...
3. Lol, that's WAY too small to read :/
4. oh balls, this isnt working out well...

5. err... what are a and b?
6. can you please show the full question
7. (Original post by Pheylan)
err... what are a and b?
Sorry I'm not doing this too well...
The graphy shows part of the function y= a ln(bx)
8. (Original post by irish_4_life)
Sorry I'm not doing this too well...
The graphy shows part of the function y= a ln(bx)
oh ok

y = aln(bx)

and you have two points it goes through

0 = aln(2b)
1 = aln(4b)

so you can solve these simultaneously

ln(2b) = 0
2b = 1
b = 1/2

1 = aln(2)
a = 1/ln(2)
9. (Original post by victor_b1992)
can you please show the full question
It's only the top line which is missed off! which i just wrote...
The graphy shows part of the function y= a ln(bx)
10. ok so
Aln(2B)=0

ln(2B)=0 ln(1)=0

so b=0.5

then sub b into Aln(4B)=1
11. what exam broad is this
12. (Original post by victor_b1992)
OCR MEI, thanks for the help

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