Quick Answers To Some Questions! (3 Viewers)

[velzee]

what did people get for 7 b ii for the area?

 

[m.incognito]

20pi/3

 

[velzee]

20pi/3

yep me too =)

 

[lightning9t]

4c)iv) anyone?

 

[m.incognito]

I repeat 10 and 2/3

 

[anianiani]

what did people get for 5 c iii
the rate the light intensity was decreasing?

 

[mkobey]

does anyone have asnwer to 7)ciii?

 

[velzee]

does anyone have asnwer to 7)ciii?

i got 4/27 but im nt sure

 

[ttelfer]

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)

 

[pookins]

So for question 4b what will the marks be if 179 and 13 are written? 1,2 or 3 out of 4?

 

[chelsea491]

why would u write it down man

 

[ipod21]

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

3.)a.)
ii.) 1 - ln(1/root2)

I think i got (from memory) -in(1/root2).

 

[ttelfer]

why would u write it down man

i wanted to see how i went?
i had an hour left and our school doesn't let us out early...

 

[LiLBoBo]

I repeat 10 and 2/3

YESH!! 100% AGREEDD!! 10 and fucking 2/3s (sorry, just a little bit excited.)

 

[LiLBoBo]

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

5.)a.)y=x + cos3x + 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.)7/29
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.) I CAN'T READ MY WRITING.

5) A) y= x +2cos3x+5

 

[ttelfer]

5) A) y= x +2cos3x+5

agreed. copied it out of my book wrong. will change it now.

 

[plam90]

any1 got an answer for 9c)ii?

i got -5/12 i think

 

[lightning9t]

YESH!! 100% AGREEDD!! 10 and fucking 2/3s (sorry, just a little bit excited.)

Farout i got 2 answers for this, correct me where i'm wrong

1. integral (between 4 and -4) x^2/8 + 3
= [x^3/24 + 3x] (between 4 and -4)
= 14/2/3 - (-14/2/3)
= 29/1/3
Area of rectangle = 40
shaded area = 40 - 29/1/3 = 10/1/3

2. integral of square root (8y-24) between y = 5 and y = 3
= [(8y-24)^3/2]/12 between 5 and 3
= 5/1/3 - 0

Not sure whats happening..

 

[Wingom]

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

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.)7/29
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)

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!!

 

[H4rdc0r3]

fuck got 5a wrong... 6/3 = 3 lame....