Getting to Cambridge: STEP by STEP!

Reply 360

Student403

19

Original post by Imperion

What modules have you completed and are currently doing :smile:

Ooh right

AS: C1, C2, C3, M1, S1, FP1

A2: (C4, D1, S2, M2, M3) - done, (FP2, FP3, M4, M5) - doing

Reply 361

Imperion

17

Original post by Student403

Ooh right

AS: C1, C2, C3, M1, S1, FP1

A2: (C4, D1, S2, M2, M3) - done, (FP2, FP3, M4, M5) - doing

Daaaaaaaaaaaaaaaaaaaaaaaaaaaaamn nice man! Didn't like stats? :tongue:

You applying for maths btw?

Reply 362

Student403

19

Original post by Imperion

Daaaaaaaaaaaaaaaaaaaaaaaaaaaaamn nice man! Didn't like stats? :tongue:

You applying for maths btw?

Thanks

Nah engineering

Reply 363

Zacken

OP

22

Update:

Finished FP3 vectors. Went through all 20 of the mixed exercises. Got it all correct except for Q15 where my method was wonky. I don't think I'd have thought of using area to find length, that'll teach me to draw more diagrams in the future! I've noticed that I get confused between which form of lines/planes they want me to give. I made the 'mistake' of writing the vector form of a line/plane as (r-a) x p = a x p and r.n = d instead of r = a + ub or r = a + ub + sc.

Did Ayman's vectors test, it was fairly straightforward. Got full marks on that, yay!

Otherwise - putting the work on pause for a bit, going out for dinner. Probably read over matrices and try some questions out when I'm back.

Reply 364

Duke Glacia

16

Original post by Zacken

Update:

Finished FP3 vectors. Went through all 20 of the mixed exercises. Got it all correct except for Q15 where my method was wonky. I don't think I'd have thought of using area to find length, that'll teach me to draw more diagrams in the future! I've noticed that I get confused between which form of lines/planes they want me to give. I made the 'mistake' of writing the vector form of a line/plane as (r-a) x p = a x p and r.n = d instead of r = a + ub or r = a + ub + sc.

Did Ayman's vectors test, it was fairly straightforward. Got full marks on that, yay!

Otherwise - putting the work on pause for a bit, going out for dinner. Probably read over matrices and try some questions out when I'm back.

genius.............Vectors in a day :redface:

bon appetite

Reply 365

Ayman!

15

Original post by Zacken

Update:

Finished FP3 vectors. Went through all 20 of the mixed exercises. Got it all correct except for Q15 where my method was wonky. I don't think I'd have thought of using area to find length, that'll teach me to draw more diagrams in the future! I've noticed that I get confused between which form of lines/planes they want me to give. I made the 'mistake' of writing the vector form of a line/plane as (r-a) x p = a x p and r.n = d instead of r = a + ub or r = a + ub + sc.

Did Ayman's vectors test, it was fairly straightforward. Got full marks on that, yay!

Otherwise - putting the work on pause for a bit, going out for dinner. Probably read over matrices and try some questions out when I'm back.

Told you it was quite nice!

Matrices won't take much time, pretty nice and easy chapter!

Have a nice dinner - date night? :tongue:

Reply 366

Zacken

OP

22

Original post by aymanzayedmannan

Told you it was quite nice!

Matrices won't take much time, pretty nice and easy chapter!

Have a nice dinner - date night? :tongue:

Thanks.

Family.

Reply 367

Number Nine

12

Original post by aymanzayedmannan

date night? :tongue:

laughable

Reply 368

Zacken

OP

22

Matrices time! Will update once I've covered a fair bit. :yep:

Reply 369

Zacken

OP

22

Update:

Done more procrastinating than I should have, had lunch - covered

3\times 3

matrices, transpose and symmetric matrices, determinants of

3 \times 3

matrices as well as inverses of

3\times 3

matrices. I wasn't very impressed with the latter given the highly algorithmical way it was presented so I went off and learnt Jordan-Gauss which made intuitive sense and I could understand how using J-G led to the inverse. Unfortunately, I've been told that the usual algorithmical way to do is is asked for specifically in the exam, so I suppose I'll have to learn it now. It looks really tedious and messy.

A lot of the results so far make sense if you treat matrices as elements of a group, so for example:

(AB)^{-1} = B^{-1}A^{-1}

is a given. Knowing how/when to post/pre-multiply is also natural if you think in terms of groups. Overall, fairly happy so far - just need to skim through a bit more and I should be done with the chapter in a bit.

Reply 370

Zacken

OP

22

Update:

Covered linear transforms. Much of this chapter seems to be tedious calculation, I'm not enjoying it at all. I feel fairly confident with transforming point to points, lines to lines and planes to planes given non-singular transformation matrices. I'm still trying to come to intuitive grips with transforming planes to lines given singular matrix transforms. Finding the matrix version of an algebraic transform is okay as well, that one makes sense. Moving on to inverting linear transform now.

Reply 371

Student403

19

Original post by Zacken

Update:

Covered linear transforms. Much of this chapter seems to be tedious calculation, I'm not enjoying it at all. I feel fairly confident with transforming point to points, lines to lines and planes to planes given non-singular transformation matrices. I'm still trying to come to intuitive grips with transforming planes to lines given singular matrix transforms. Finding the matrix version of an algebraic transform is okay as well, that one makes sense. Moving on to inverting linear transform now.