Exams

[Jonny]

Could be worse, though.

Ye could live with a Maths teacher, and have to recall all that gubbins after years of mental atrophy to help her out of an evening...

Would that poor soul be you?

[waves]

noodle. did you core it today?

mine went bloody brillient except for the two log questions in c2.

[noodleplugerine]

noodle. did you core it today?

mine went bloody brillient except for the two log questions in c2.

Yep, was a breeze.

C1 was absolutely lovely, C2 was a little more concentration but went pretty perfect.

Only issue was I kept getting k < ln0.002/ln0.8 instead of k > ln0.002/ln0.8.

Did the quesiton like 3 times and still got the same sigh.. I ended up just writing the 2nd one as my answer, hoping the examiner wouldn't look too closely.

Was only a 4 mark question, would have lost maximum 1 mark.

I THINK that's the only mark I lost, I finished about 35 mins early, had enough time to do each question 3 times to check answers.


Chem on Wednesday - Gunna be a flop.

Then 2 more maths exams and I'm off to Download.

[LazyNinja]

noodle. did you core it today?

mine went bloody brillient except for the two log questions in c2.

Yep, was a breeze.

C1 was absolutely lovely, C2 was a little more concentration but went pretty perfect.

Only issue was I kept getting k < ln0.002/ln0.8 instead of k > ln0.002/ln0.8.

Did the quesiton like 3 times and still got the same sigh.. I ended up just writing the 2nd one as my answer, hoping the examiner wouldn't look too closely.

Was only a 4 mark question, would have lost maximum 1 mark.

I THINK that's the only mark I lost, I finished about 35 mins early, had enough time to do each question 3 times to check answers.


Chem on Wednesday - Gunna be a flop.

Then 2 more maths exams and I'm off to Download.

Im surprised that you guys didn't do C1 in January. Thought you were doing Further Maths Noodle?

Do you remember the question that you were stuck on? Maybe I might be able to answer.

[noodleplugerine]

noodle. did you core it today?

mine went bloody brillient except for the two log questions in c2.

Yep, was a breeze.

C1 was absolutely lovely, C2 was a little more concentration but went pretty perfect.

Only issue was I kept getting k < ln0.002/ln0.8 instead of k > ln0.002/ln0.8.

Did the quesiton like 3 times and still got the same sigh.. I ended up just writing the 2nd one as my answer, hoping the examiner wouldn't look too closely.

Was only a 4 mark question, would have lost maximum 1 mark.

I THINK that's the only mark I lost, I finished about 35 mins early, had enough time to do each question 3 times to check answers.


Chem on Wednesday - Gunna be a flop.

Then 2 more maths exams and I'm off to Download.

Im surprised that you guys didn't do C1 in January. Thought you were doing Further Maths Noodle?

Do you remember the question that you were stuck on? Maybe I might be able to answer.

Yeah I'm doing further, but there didn't seem to be any point in doing them early. An extra few months of practice helps in the long run.

The question was something along the lines of...

24.95 < 25(1 - 5^k)

show that:

k > ln0.002/ln0.8

Very simple question, but I just got that x was greater than. Will do it again now infact :p

[LazyNinja]

Lets see,

24.95 < 25(1 - 5^k)
24.95 < 25 - (5^2)(5^k) = 25 - 5^(2+k)
5^(2+k) < 0.05
(2+k)ln5 < ln0.05 = ln (1/20)
kln5 < ln(1/20) - 2ln5
kln5 < ln(1/500) = ln0.002
k < ln0.002/ln5

oh

erm  :?  :lol:

sorry i might try again later.

[noodleplugerine]

Lets see,

24.95 < 25(1 - 5^k)
24.95 < 25 - (5^2)(5^k) = 25 - 5^(2+k)
5^(2+k) < 0.05
(2+k)ln5 < ln0.05 = ln (1/20)
kln5 < ln(1/20) - 2ln5
kln5 < ln(1/500) = ln0.002
k < ln0.002/ln5

oh

erm  :?  :lol:

sorry i might try again later.

I just remembered, it isn't 5, but 4/5, so your answer is correct since it would end up as ln0.002/ln4/5 = ln0.002/ln0.8.

Still, seems you found the same error as me :p

[LazyNinja]

Ah ok good good.

I don't think I've made a mistake cos I specifically kept the arrow pointing in the same direction the whole time and I didn't cancel any negatives. Maybe the question was wrong?

[noodleplugerine]

Ah ok good good.

I don't think I've made a mistake cos I specifically kept the arrow pointing in the same direction the whole time and I didn't cancel any negatives. Maybe the question was wrong?

Either that or I totally misread it :p

[waves]

surely being the sum of a geometric series, you need the 1-4/5 (1-r) on the bottom of the (1-4/5^k)?

[noodleplugerine]

a/1-r = 5/0.2 = 25

thus a(1-r^n)/1-r = Sum to inf(1-r^n)

Thus a(1-r^n)/1-r = 25(1-r^n)

[waves]

ahhh god i see now. thats obviously where i f*cked it totally lol

[Will]

All done :)

[WezV]

enjoy the summer!!!

[Will]

Starting work next week :P no summer fun for me
If we get on, I shall become an apprentice :D