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Quick Answers To Some Questions! (1 Viewer)

ttelfer

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Wingom said:
Some corrections.. quite sure..
3. b) ii) 1/2ln(2)
4. c) iv) 32/3
NOT SURE: For 7. c) ii) i got 7/27
And overall... I think I have lost 3 marks!! from Silly mistakes! GAH!!
you're right about 4c. i can see what i did wrong now.. my god that was stupid. i only found half of the area.
and yeah, 7c. is 7/27. i edited it. copied my writing wrong.
 

ewasemma

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ttelfer said:
this is what i got.
wrote the answers in my booklet in the extra ime i had.
correct me if i'm wrong, please.

1.)a.) 1.62
b.) (3x-2)(x+1)
c.) (n+2)/(n^2+n)
d.) x= 2/1/2 and -1
e.) 1 + 3root3
f.) 903

2.)a.)i.)18x(x^2+3)^8
ii.)x(2lnx +1)
iii.)((x+1)cosx-sinx)/(x+4)^2
b.)x+2y-14=0
c.)i.) ln(x+5) + c
ii.) 1/3

3.)a.)ii.) (3,5)
iii.) root5
v.) 8
b.)i.) -tanx
ii.) 1 - ln(1/root2)

4.)b.)i.)215
ii.)12
c.)i.)(0,3)
ii.)(0,5)
iv.)5/1/3 (SHOULD ACTUALLY BE 10/2/3)

5.)a.)y=x + 2cos3x + 5
b.)i.) (-1/2)<x<(1/2)
ii.) 19/40
c.)i.)6000
ii.)(ln(1/6))/-6
iii.)-298.63

6.)a.) (3pie)/4 and (-3pie)/4
b.)i.)20
ii.)t=10
iii.)t=6
iv.)493/1/3
c.)(18/3/4)pie

7.)a.) x= e^3 or e^-1
b.)ii.)(6/2/3)pie
c.)ii.)7/27
iii.)4/9

8.)a.)iii.)max(0,0) min(2,-16),(-2,-16)

9.)a.)i.)0.0225
ii.) 0.17
b.)i.)TOO LONG TO TYPE.
ii.)975.85
c.)ii.)I GOT THIS WRONG.

10.)a.)5ln5-4
b.)ii.)x= l/root2
iii.) s(root2 -1)
Im not sure if you accidently typed it wrong or whatever but im pretty sure that 7c)ii) is 7/27 however if i am wrong feel free to explain how u got that answer :)
 

5647382910

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Timothy.Siu said:
ahhhhhhhhhhhhhhhhhhhhh fukkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
fuk fuk fuk
shit
i put my heart into that q and i fkd it up
but still i proved it was min by showuin second deriviative is greater than zedro
wat can i get outa 3?
 

r.uss

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Just wondering... In question 1, the simplify fraction one.... am I going to lose a mark because I left the denominator as n(n+1)?

You see, going off everyone's answers, I've nailed the harder questions, and it would be a crying shame if got 119/120 for a damn fraction.

I have a bad feeling about this....
 

alez

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r.uss said:
Just wondering... In question 1, the simplify fraction one.... am I going to lose a mark because I left the denominator as n(n+1)?

You see, going off everyone's answers, I've nailed the harder questions, and it would be a crying shame if got 119/120 for a damn fraction.

I have a bad feeling about this....
i did the same thing
doubt we'll lose marks, it was only a 2 mark question or whatever
eh whatever
 

lalaka

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lightning9t said:
Q.4b)i) 180mm
ii) > 12.4 = 13 times
Q.5
a) y = x + 2cos3x + 5
b)i) -1/2 < x < 1/2
ii) 19/40
c) iii) -298 lux/m
Q.6. b) iv) 1480/3
c) 18/3/4 (pi)
Q.7. b)ii) 20(pi)/3
Q.8. iv) looks like two boobs hanging down
Q.9. b)ii) 975.85
c)ii) (5kb^4)/12 (below the x-axis)
Q.10. a) 5ln5 - 4
b)ii) x = l/squareroot(2)
iii) MP = s(l - x)/x (sub in x = l/squareroot(2)

Please correct me if I'm wrong, just quickly done










R u sure you got Q.8. iv) looks like two boobs hanging down cause i got it to maaaaaaaan
 

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