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# 4756 OCR MEI FP2 22nd June 2015 watch

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2. (Original post by Dan205)
Did you get -32 for the product of v?

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32 e^j(pi/2)

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3. (Original post by Genty Boy)
32 e^j(pi/2)

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Uh oh... I got e^j(pi) :/

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4. (Original post by Dan205)
Uh oh... I got e^j(pi) :/

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For the first z value I got 2e^j(pi/10)...

Raise that to 5 I think is how you work it out...

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5. (Original post by Genty Boy)
For the first z value I got 2e^j(pi/10)...

Raise that to 5 I think is how you work it out...

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Nah that makes sense, I don't know what I did haha!

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6. (Original post by Dan205)
Nah that makes sense, I don't know what I did haha!

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I may be wrong.

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7. (Original post by Dan205)
Did you get -32 for the product of v?

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Fairly sure it was +32j
8. (Original post by Genty Boy)
32 e^j(pi/2)

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It said simplified form so you had to leave it as just +32j
9. Overall, nice exam IMO
I think it'll be around 62 for an A
10. (Original post by chizz1889)
Fairly sure it was +32j
Yep, that's the same as 32e^pi/2 j
11. Well that went surprisingly well. I didn't even expect to finish.

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12. Last integral was x/2 * ln ((1+x)/(1-x)) + 1/2 * ln(1-x^2) + c
13. (Original post by sarcasmrules)
Yep, that's the same as 32e^pi/2 j
Yeah but it said 'simplified form' which is 32j
14. Wow, that was such a nice exam, feeling pretty confident about that but probably will be around 66-68 for an A*

I got v^5 = 32j
15. (Original post by chizz1889)
Last integral was x/2 * ln ((1+x)/(1-x)) + 1/2 * ln(1-x^2) + c
I got that also.
16. M^4 = 43m^2 + 42m
17. For The PDP^-1 = M^4

The diagonal components of D were 1;0;2401
18. For the lambda3 the vector was (4,1,3)
19. Coordinates (a,b)?

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20. The eigenvalues were -1, 0, 7.

The eigenvector for 7 was (4,1,3) I think

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