Maths, Addmaths and Statistics: Post your doubts here!

[fatima0000]

november 2007 p2 maths 4024
Qno 6 (b) (ii)

 

[AhsanAfzal]

the xterior angle of a triangle is?? i mean the rule regarding oppostie interior angle adding up to become the xterior angle. i dont get it.....sum1 please xplain usama321

180-(any angle)=its exterior angle

 

[zeekay132]

Please anyone solve this question

 

[asma tareen]

Please anyone solve this question

tag me if u get the answer

 

[usama321]

tag me if u get the answer

Please anyone solve this question

k am not sure but this is what i came up with

f(a)= 2a -5/2a
(4a^2 -5)/2a = b

now f(-a) = -2a +5/2a
b = -4a ^2+ 5/2a
-b = 4a^2 + 5/2a

thus it is proved?

 

[asma tareen]

k am not sure but this is what i came up with

f(a)= 2a -5/2a
(4a -5)/2a = b

now f(-a) = -2a +5/2a
b = -4a + 5/2a
-b = 4a + 5/2a

thus it is proved?

got it thnx

 

[usama321]

forgot the squares....edited it

 

[zeekay132]

The examiner report says: This part was often omitted. Only a few correct answers were seen with many candidates giving a = 1 as their solution

 

[pikachu]

how to do nov 2011 maths paper 1 (variant 12) question # 28 b(ii)?

 

[Suchal Riaz]

WARNING: ADDITIONAL MATHS AHEAD
i have completely no idea how to solve this

 

[HarithAslam]

WARNING: ADDITIONAL MATHS AHEAD
i have completely no idea how to solve this
View attachment 24793

3(i) the magnitude of a unit vector is always 1.
0.28^2+p^2=1
p=0.96
(ii) 12i+17j-qi+7j=k0.28i+k0.96j
(12-q)i+24j=k0.28i+k0.96j
k=25
12-q=25*0.28
q=-8


hoped this helped!

 

[lovely rose]

Thanks Saad Mughal

 

[lovely rose]

Let x be recommended calories.
166 = 8.3% * x
166 = 8.3/100 * x
x = 166*100/8.3
x = 2000 calories.

thankxx buudy

 

[Suchal Riaz]

3(i) the magnitude of a unit vector is always 1.
0.28^2+p^2=1
p=0.96
(ii) 12i+17j-qi+7j=k0.28i+k0.96j
(12-q)i+24j=k0.28i+k0.96j
k=25
12-q=25*0.28
q=-8


hoped this helped!

tell me how u did second part. i never knew that magnitude of a unit vector is 1

 

[sweetiepie]

if R = rs 500 n = 10 and i = 6% then amount of ordinary anuuity

A RS 4580.11
B RS 8131.22
C RS 6590.42
D RS 5862.42

for ordinary annuity

-n
P = R[1-(1+i) ]
divide
i

plzz some help me how to find it as m not able too

 

[sweetiepie]

The Order Of Matrix [1 2 8 3 ]
A 4*1
B 1*4
C 4*4
D 3*4

 

[sweetiepie]

If A =
[1 1 ]
[0 1] THEN ITS INVERSE IS

A [1 -1]
[0 1 ]

B [-1 -1]
[0 -1]

C [1 0]
[0 1 ]

D
[0 1]
[1 1]

 

[Hassan Kazmi]

if R = rs 500 n = 10 and i = 6% then amount of ordinary anuuity

A RS 4580.11
B RS 8131.22
C RS 6590.42
D RS 5862.42

for ordinary annuity

-n
P = R[1-(1+i) ]
divide
i

plzz some help me how to find it as m not able too

Ordinary Annuity = R{[(1+i)^n]-1}/i

So answer is 500 x [(1.06^10)-1]/0.06 = 6590

 

[Saad Mughal]

If A =
[1 1 ]
[0 1] THEN ITS INVERSE IS

A [1 -1]
[0 1 ]

B [-1 -1]
[0 -1]

C [1 0]
[0 1 ]

D
[0 1]
[1 1]

A is the answer.

 

[Saad Mughal]

The Order Of Matrix [1 2 8 3 ]
A 4*1
B 1*4
C 4*4
D 3*4

B 1*4