OCR (not-MEI) FP1 - Friday 20th May 2016

For the sum I got -1/k for the product 1 and the the second part 1/k^2

And for the difference method question I got the sum to infinity as 1/3 but others got 1/6 how about u?

Reply 61

farryharnworth

1

I thought that was alright, at least compared to M2...
I got:
1)
1/2 * n(n-1)(2n+3)
2)
i) sqrt(3)-3i
ii) -1/49 + 4sqrt(3)/49 i
3)
i) alpha + beta = -1/k
alpha * beta = 1
ii) (alpha + 1/alpha) * (beta + 1/beta) 1/k^2
4)
i) (5a-3b 10 0)
ii) (6b-5)
iii) (6a 12 18)
(4a 8 12)
(-a -2 -3)
5) [inductive proof]
6)
i) |z-3-3i| = sqrt(5)
ii) [argand diagram]
iii) 2 + 5i, 4 + i
7)
i) Shear, x axis invariant, (0,1) mapped to (3,1)
ii) (0 -1)
(-1 0)
Reflection in y=-x
8)
i) [Show that]
ii) n / 3(2n+3)
iii) 1/ 2(2n+1)
9)
i) [Show that]
ii) The equations were consistent
10)
i) +/- (5 + 4i)
ii) [Show that]
iii) +/- (5/41 +/- 4/41 i)

(edited 7 years ago)

Reply 62

S.G.

22

I think I got everything bar the argand diagram question (how many marks was that?) Strange times when C1 is harder than FP1

Reply 63

CC21231

12

Original post by farryharnworth

I thought that was alright, at least compared to M2...
I got:
1)
1/2 * n(n-1)(2n+3)
2)
i) sqrt(3)-3i
ii) -1/49 + 4sqrt(3)/49 i
3)
i) alpha + beta = -1/k
alpha * beta = 1
ii) (alpha + 1/alpha) * (beta + 1/beta) 1/k^2
4)
i) (5a-3b 10 0)
ii) (6b-5)
iii) (6a 12 18)
(4a 8 12)
(-a -2 -3)
5) [inductive proof]
6)
i) |z-3-3i| = sqrt(5)
ii) [argand diagram]
iii) 2 + 5i, 4 + i
7)
i) Shear, x axis invariant, (0,1) mapped to (3,1)
ii) (0 -1)
(-1 0)
Reflection in y=-x
8)
i) [Show that]
ii) n / 3(2n+3)
iii) 1/ 2(2n+1)
9)
i) [Show that]
ii) The equations were consistent
10)
i) +/- (5 + 4i)
ii) [Show that]
iii) +/- (5/41 +/- 4/41 i)

I think I got the same answers for the questions I remember so that's pretty good but am gutted I couldn't do the last question

Reply 64

sdhand

1

Original post by Bobby21231

For the sum I got -1/k for the product 1 and the the second part 1/k^2

And for the difference method question I got the sum to infinity as 1/3 but others got 1/6 how about u?

I got the same as you for both of those.

Reply 65

CC21231

12

I have a feeling it was 2/3 for the argand diagram and 3 for the pints of intersection but I could be wrong

Original post by SGHD26716

I think I got everything bar the argand diagram question (how many marks was that?) Strange times when C1 is harder than FP1

Reply 66

sdhand

1

Original post by farryharnworth

I thought that was alright, at least compared to M2...
I got:
1)
1/2 * n(n-1)(2n+3)
2)
i) sqrt(3)-3i
ii) -1/49 + 4sqrt(3)/49 i
3)
i) alpha + beta = -1/k
alpha * beta = 1
ii) (alpha + 1/alpha) * (beta + 1/beta) 1/k^2
4)
i) (5a-3b 10 0)
ii) (6b-5)
iii) (6a 12 18)
(4a 8 12)
(-a -2 -3)
5) [inductive proof]
6)
i) |z-3-3i| = sqrt(5)
ii) [argand diagram]
iii) 2 + 5i, 4 + i
7)
i) Shear, x axis invariant, (0,1) mapped to (3,1)
ii) (0 -1)
(-1 0)
Reflection in y=-x
8)
i) [Show that]
ii) n / 3(2n+3)
iii) 1/ 2(2n+1)
9)
i) [Show that]
ii) The equations were consistent
10)
i) +/- (5 + 4i)
ii) [Show that]
iii) +/- (5/41 +/- 4/41 i)