Maths, Addmaths and Statistics: Post your doubts here!

[ritesh isuri]

Thanks Alot Man !

u r welcome!

 

[CoolBreeze]

Solve 8^x=0.25

 

[ritesh isuri]

Solve 8^x=0.25

if u apply log on both side u get x=log0.25/log8= (-2/3)

 

[ritesh isuri]

Solve 8^x=0.25

or if u do not want to solve by log u can convert the equation to base 2 to get 2^3x=2^-2 and then u compare the powers, 3x=-2, therfore x=-2/3

 

[Drockz]

I got u but i have one question:
If we multiply B By (A+I)-1 , how can we say that X is equal to (A+1)-1?

first of all when we factorize it we will get (A + I )X= B. since we have to find X alone only, we have to remove (A + I ). that can only be done if we multiply ( A+ I) by its inverse which we have found in part 1. Another important thing in matrix is that if we multiply anything in additional on the left hand side, we have multiply the same thing on the right hand side. so it goes like this..... (A+I)-1 (A+I) X = (A+I)-1 B................................. a matrix times it's inverse will be an identity matrix.Any matrix times the identity matrix will be the matrix itself. so eventually we derive the equation............ X=(A+I)-1 B. which will give u the answer ( 4 2)

 

[Enferno]

URGENT​

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Q:​

In the diagram, XP=1/2 PQ, QY=1/3 PQ and XR=2/5 XZ. Find the ratio of the area of QRZ to the area of QYZ.

 

[Enferno]

URGENT​

View attachment 19220 ​

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Q:​

In the diagram, XP=1/2 PQ, QY=1/3 PQ and XR=2/5 XZ. Find the ratio of the area of QRZ to the area of QYZ.

Guys please, tomorrows my paper

 

[Mustafa Malik]

Can any1 tell me the name of the add math books which are followed in most pakistani skools??

 

[Enferno]

Can any1 tell me the name of the add math books which are followed in most pakistani skools??

New Additional Mathematics

 

[CoolBreeze]

Can any1 tell me the name of the add math books which are followed in most pakistani skools??

New Additional Mathematics by Ho Soo Thong and Khor Nyak Hong,!!

 

[Enferno]

New Additional Mathematics by Ho Soo Thong and Khor Nyak Hong,!!

yes, thats right

 

[Mustafa Malik]

New Additional Mathematics by Ho Soo Thong and Khor Nyak Hong,!!

thnx

 

[Dashing Cancerian]

kindly help in Q8,,,,

 

[HamzaNaqi]

Extra sheet is not allowed

But in examiner report it is written u can use it if genuine working os required

 

[CoolBreeze]

I am solving AdMaths past papers for my Mid terms tomorrow. I was doing logarithms and in two places my calculator contradicted with the answer. The whole process was right and now I am in doubt that whether there's something wrong with my calculator. Can anyone tell me the answers to these:
lg 6/lg 3
Is it 1.0995 or 1.63???
lg 5/lg 3
Is it 1.02 or 1.46????

 

[ritesh isuri]

I am solving AdMaths past papers for my Mid terms tomorrow. I was doing logarithms and in two places my calculator contradicted with the answer. The whole process was right and now I am in doubt that whether there's something wrong with my calculator. Can anyone tell me the answers to these:
lg 6/lg 3
Is it 1.0995 or 1.63???
lg 5/lg 3
Is it 1.02 or 1.46????

its 1.63 and 1.46

 

[scouserlfc]

kindly help in Q8,,,,

Can u specify a particular part which needs help ???

 

[Dashing Cancerian]

Can u specify a particular part which needs help ???

i have dne it already..

 

[sweetiepie]

Q. If two linear equations in two unknowns have no common solution, these equations are called ?
A. Consistent B. Inconsistent C.Identical D. Independent

Q. Solve x- 12x + 36 = 0
By Factorization Method
By Quadratic Formula

Q. The Sum Of three Consecutive intergers is 54. What are the intergers?

plss some one help me i need all steps in answer ????

 

[Shadow]

I cannot understand the main difference b/w PERMUTATION and COMBINATION in add mthx. Where to use permutation and where to use combination? Plz help e out with it ...