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# OCR (non mei) Further Pure 1 20th May 2016 watch

1. What did people get for the square root of 9+40i or something like that
2. (Original post by AvKar)
What did people get for the square root of 9+40i or something like that
5+4i
-5-4i
3. (Original post by Benabell81)
5+4i
-5-4i
I got this as well
4. (Original post by AvKar)
What did people get for the square root of 9+40i or something like that
I got 5+4i and -5-4i
5. Did you lot get 1/2n(n-1)(2n+3) for the first question?
6. (Original post by JamesLing_)
Did you lot get 1/2n(n-1)(2n+3) for the first question?
I did
7. Hey did you guys get the matrix bit to be consistent?
8. (Original post by kathrynloops)
Hey did you guys get the matrix bit to be consistent?
Yeah I did
9. (Original post by JamesLing_)
Did you lot get 1/2n(n-1)(2n+3) for the first question?
I put the equation into wolfram alpha and apparently that's not right. The correct answer is 1/2n(2n^2 +n -3).

The equation was sum of (3r+1)(r-1) wasn't it?
10. (Original post by olegasr)
I put the equation into wolfram alpha and apparently that's not right. The correct answer is 1/2n(2n^2 +n -3).

The equation was sum of (3r+1)(r-1) wasn't it?
It's the same thing but just multiplied out isn't it?
11. What did people get for where the circle and line l meet?
I got something like 3(or 2 I can't remember)+5i and 4+i
12. (Original post by Benabell81)
I got 1/(k^2)
I got that too👍
13. I think the last question was 5/41 + 4/41i with plus or minus (4 answers), two other people in my class and I got the same answer
14. (Original post by swagmister)
I think the last question was 5/41 + 4/41i with plus or minus (4 answers), two other people in my class and I got the same answer
I got that
15. (Original post by swagmister)
I think the last question was 5/41 + 4/41i with plus or minus (4 answers), two other people in my class and I got the same answer
I believe I got that
16. For the matrix question

Did anyone get: Sheer y axis invariant SF 3

The matrix Q=
( 0 -1 )
( -1 0)

Which is a reflection in the line y=-x
17. (Original post by Benabell81)
For the matrix question

Did anyone get: Sheer y axis invariant SF 3

The matrix Q=
( 0 -1 )
( -1 0)

Which is a reflection in the line y=-x
(Original post by Benabell81)
For the matrix question

Did anyone get: Sheer y axis invariant SF 3

The matrix Q=
( 0 -1 )
( -1 0)

Which is a reflection in the line y=-x
Pretty sure i said it was a shear in the x axis..
18. (Original post by 8Alex)
Pretty sure i said it was a shear in the x axis..
Yh same

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