OL Maths :D

errlloyd

Nah Dumble and Phic I think you guys did it wrong.

It was just a surds mistake...


If it had been

2routex^2 you would have been right...

but it was (2routex)^2

Which due to the wonder of BEMDAS, is different.

Oh right its pretty easy to prove

Sure your answers need to work with pythag and 30^2 + 15^2 =/= 45^2

phasers

I went in today not knowing what to expect, because I dropped down quite suddenly near the end of the year.Had no OL notes to go over...

I hadn't a clue about a lot of it, but I gave it all a go and it went suspiciously alright...

Lucet

I think it was a lovely paper! I need to get at least B3 to get into the course I want. If the paper two will be as nice as this I will get it easily .
I did questions 1, 2, 3, 4, 5, 7, 8 and started Q6, but I was short on time. I was stuck on some questions like Q2 B part iii .

errlloyd

Lucet wrote: »

I think it was a lovely paper! I need to get at least B3 to get into the course I want. If the paper two will be as nice as this I will get it easily .
I did questions 1, 2, 3, 4, 5, 7, 8 and started Q6, but I was short on time. I was stuck on some questions like Q2 B part iii .

It was tricky. What you did was took the original value and divided by 100 to get 1%. Then divided the difference by that to get percentage per annum

Bongomc

For the Q.3 part C i got : the area of a triangle : (half base by height) with a base of (square root 45) and the height (square root (45 divded by 2)) so that gave me 11.25cm so there was 2 of them so 22.5cm squared.

Probably wrong but i'm not too bothered coz the rest of the paper was grand.

Lucet

errlloyd wrote: »

It was tricky. What you did was took the original value and divided by 100 to get 1%. Then divided the difference by that to get percentage per annum

Quee? What are you talking about? I'm talking about 27x X 3^x = 1/729 . Or did you mixed up something?

phic

errlloyd wrote: »

Nah Dumble and Phic I think you guys did it wrong.

It was just a surds mistake...


If it had been

2routex^2 you would have been right...

but it was (2routex)^2

Which due to the wonder of BEMDAS, is different.

Oh right its pretty easy to prove

Sure your answers need to work with pythag and 30^2 + 15^2 =/= 45^2

Um ok? Someone tried to explain this to me earlier, didn't understand then either! meh doesn't matter I'm not using maths for points anyway, only had to pass.

MissRealist

StaticNoise wrote: »

All you do is change the sign. In this case it was a plus, not a minus. Numbers stay the same, only the sign.

Nuh-uh. That's a formula. You square the two numbers given in the question (Leaving out the i) then add them together and get the square root of that. Answer was 5 if I remember correctly.

Can anybody tell me how you multiply square roots? Completely blanked on that...

errlloyd

Lucet wrote: »

Quee? What are you talking about? I'm talking about 27x X 3^x = 1/729 . Or did you mixed up something?

Oh sorry.

This is indices. Ok so the rules are pretty clear, when multiplying indices ad the powers and do it. So for example, 2^3 x 2^2 = 2^5 = 32

So we had 3^3 x 3^x = 1/729...

We knew 3^6 was 729...

Which means 3^-6 was 1/729

Which means we needed to to take 3 from that power to get the power required for the question..

Hence 3^-9

errlloyd

MissRealist wrote: »

Nuh-uh. That's a formula. You square the two numbers given in the question (Leaving out the i) then add them together and get the square root of that. Answer was 5 if I remember correctly.

Can anybody tell me how you multiply square roots? Completely blanked on that...

Add the powers !!

Remember for square roots (route not sure lol) the power is 1/2

MissRealist

Lucet wrote: »

I think it was a lovely paper! I need to get at least B3 to get into the course I want. If the paper two will be as nice as this I will get it easily .
I did questions 1, 2, 3, 4, 5, 7, 8 and started Q6, but I was short on time. I was stuck on some questions like Q2 B part iii .

B(iii) was a pain in the butt! You needed to change the 27 to 3^3 and the 729 to 3^6 and then play with the indecies

MissRealist

errlloyd wrote: »

Add the powers !!

Remember for square roots (route not sure lol) the power is 1/2

Thanks! I think I actually got it right!! lol!!

Sheer luck. Remembered something about halves and changed the that. You've just made me a whole pile happier!

MrPirate

That paper was awesomely easy! Except Q.4. I came from honours last year and when they covered it in my pass class they were "going over it" so I never got into it..
But anyway, got it all done really bar Q. 4! I drew the examiner a smiley elephant near the end too. ^^

Lucet

MissRealist wrote: »

B(iii) was a pain in the butt! You needed to change the 27 to 3^3 and the 729 to 3^6 and then play with the indecies

It was a huge pain in the butt I'd tell . I was thinking of indices, but that 1/729 just messed me up. Well, I hope I'll get at least attempt mark in that question :rolleyes:. On Sunday I'll do several past papers, because I suck at equations of a line/circle and Q11 is horrible for me. Maybe I'll try vectors instead :cool:.

phic

errlloyd wrote: »

Oh sorry.

This is indices. Ok so the rules are pretty clear, when multiplying indices ad the powers and do it. So for example, 2^3 x 2^2 = 2^5 = 32

So we had 3^3 x 3^x = 1/729...

We knew 3^6 was 729...

Which means 3^-6 was 1/729

Which means we needed to to take 3 from that power to get the power required for the question..

Hence 3^-9

3^-9 isn't the answer though, you had to solve for x...

manutd4life

i found it easy.although some of them gave me problems

Homicidal_jesus

manutd4life wrote: »

i found it easy.although some of them gave me problems

ya same 4 me first 4 questions where fine and did fairly good in other 4 had plenty of time

jd007

Soooooo easy!!! I had all the q's answered in an hour!!!:D

Claypigeon

Got the Parts A and B of 6 questions done quite well and the odd C from each, and attempted the remaining two in case. Although I did quite poorly in those two. Should be fine. Not that worried about maths as it isn't needed for my course.

phic wrote: »

3^-9 isn't the answer though, you had to solve for x...

Whaaa?

mosis11

heyguys sorry for the inconvienience but would someone tell me if i passec paper 1 if i put the qs i got right up??
Q1....b (i) b (ii) b(iii) c(i)
Q4...a b(i) b(ii) c(i)
Q5...a b(i) b(ii)
q7...a b(I) b(II)
q8...a

paper 1 not strong 4 me but hoping for 20o + points on paper 2
so wat u think thanks good luck in the exams
oh and i was close with other qs so attempt marks aswell

happydayz182

for the indices if you just worke out on you calculator that it was -9 what do you get??

Fluorescence

Yeah I got -9 for the X in indices too I checked it in the original solution and it worked :P

I thought the paper was fantastic Yay pass maths!

Futurism

I thought that writing x = -9 was full marks?

ThatWouldBeNice

happydayz182 wrote: »

for the indices if you just worke out on you calculator that it was -9 what do you get??

Should just get full marks, that's what I did - it didn't say ''without the use of a calco" or anything. :cool:

ThatWouldBeNice

Mr.S wrote: »

It does say "all workings must be shown" though, or something along thoes lines.

God, I forgot about that I maybe showed a bit of working out, hope it'll do.

c_92

By the way, anyone tell me what it means why it says solve |z| in complex numbers?

Find the modulus of it. square root of a squared plus b squared

Claypigeon

Ah I get what people mean.

The answer is not 3^-9.

The answer is x = -9.

Because it was asked in the form find x so that x = blah blah and x was the number that was 3^x

kevwall

well i thought it was handy enough, thought art c ii, on q1 was a bitch, never saw it before!
:eek:

Claypigeon

kevwall wrote: »

well i thought it was handy enough, thought art c ii, on q1 was a bitch, never saw it before!
:eek:

What type was that now? I can't remember it myself? Refresh me!

Isaac702

Well I dropped down to ordinary about a month back in the interest of my other subjects. I can say it was a good idea.

The paper was easy enough although some things took me a minute of reading over them. I would be surprised if I didn't get an A1 on this paper.