[Sora]

Been doing loads of past papers for my C2 exam next week, and both of these questions I got parts of the question wrong.



For the first one I got:



And I factorised using the quadratic formula to get:


But this is wrong...



For the second one I got n=2.71 through the use of simultaneous equations. I then substituted in n to find a value for a. I got 8.99 which is way out of the mark scheme's tolerance.

Any help will be appreciated. I can post exactly what I did if it will help, just let me know.

Thanks,
Sora

[raheem94]

(Original post by Sora)
Been doing loads of past papers for my C2 exam next week, and both of these questions I got parts of the question wrong.



For the first one I got:



And I factorised using the quadratic formula to get:


But this is wrong...



For the second one I got n=2.71 through the use of simultaneous equations. I then substituted in n to find a value for a. I got 8.99 which is way out of the mark scheme's tolerance.

Any help will be appreciated. I can post exactly what I did if it will help, just let me know.

Thanks,
Sora

Why the hell did you used the quadratic formula?



Now solve it.

[Sora]

I can't read my own writing xD Thank you!

Any help on the logs?

[raheem94]

(Original post by Sora)
I can't read my own writing xD Thank you!

Any help on the logs?

Sub in (2,6),

Sub in (3,18),

Now divide (2) by (1), and then use logs.

[Sora]

Both of these were silly mistakes on my part -.- Thank you