Mathematics: Post your doubts here!

[Thought blocker]

For this.

Okay.

 

[TheAwesome]

can someone please help me with Q6 of maths p33 2011 november. I dont get why arg(w^3) = π/4 shouldn't it be -3π/4?

 

[daredevil]

For Modulus questions , i get the two values of X which the questions asks ..
however when i try to write the inequality i dont get it !
is there any rule to write the inequalty because sometimes they give ranges as ans and sometimes ... or ,,,,

if the answer is
x<k or x>k+m

where k and m are constants and the purpose is that x is lesser than k and x is greater than a number greater than k. this is also a range.... just that it is n the extremes and not between 2 extremes.

if instead the inequalities are k<x<k+m then we get the thing that u are calling 'range' and this lies between the extremes.


furthermore, u decide the range by looking at ur answer.
e.g. if u are getting the answers:
x>k
x>m
(or any other answers really) just plot them on a numberline and see where they overlap. that will be ur answer. for further confirmation make sure to put a number from the answering range into the equation in the question to check if u were right. do check numbers by putting them into the equation to confirm that u have the correct range.

i hope that was not too confusing.
)

 

[sitooon]

if the answer is
x<k or x>k+m

where k and m are constants and the purpose is that x is lesser than k and x is greater than a number greater than k. this is also a range.... just that it is n the extremes and not between 2 extremes.

if instead the inequalities are k<x<k+m then we get the thing that u are calling 'range' and this lies between the extremes.


furthermore, u decide the range by looking at ur answer.
e.g. if u are getting the answers:
x>k
x>m
(or any other answers really) just plot them on a numberline and see where they overlap. that will be ur answer. for further confirmation make sure to put a number from the answering range into the equation in the question to check if u were right. do check numbers by putting them into the equation to confirm that u have the correct range.

i hope that was not too confusing.
)

still not coming onto my brain
try any one




I know how ti find x xalues , tell me how the inequalities are going to be > ...

 

[MiniSacBall]

Integration of 4/3x-2 .... I know it's simple but just can't get it .
I think answer is indefinite, Not possible!
Right?
Also derivative of 4/3x+2, i get a different answer :/

 

[hamza.k143]

Hi guys.Anyone can help me with the diff of this question.Thanks a lot.....
Its question 8 from oct nov 12(31)

Here u go if u need any help regarding maths just mail me the questions

 

[hamza.k143]

Integration of 4/3x-2 .... I know it's simple but just can't get it .


I think answer is indefinite, Not possible!
Right?

It will be 4(1/3x-2)=4ln(3x-2)

 

[daredevil]

It will be 4(1/3x-2)=4ln(3x-2)

shouldn't it be (4/3)ln(3x-2) ?? becz the derivative of 3x-2 is 3 right?? so we need to multiply and divide by 3...??

 

[sitooon]

shouldn't it be (4/3)ln(3x-2) ?? becz the derivative of 3x-2 is 3 right?? so we need to multiply and divide by 3...??

you are right !

 

[hamza.k143]

shouldn't it be (4/3)ln(3x-2) ?? becz the derivative of 3x-2 is 3 right?? so we need to multiply and divide by 3...??

No buddy we need the integral and integral of 1/x is lnx here we have 4 on the denominator so we will take 4 out the question basically can be split in

4×1/3x-2=4ln(3x-2)

 

[sitooon]

No buddy we need the integral and integral of 1/x is lnx here we have 4 on the denominator so we will take 4 out the question basically can be split in

4×1/3x-2=4ln(3x-2)

I am sorry to say it !
she was right ,

 

[sitooon]

How to know if its going to be range , or ( or inequality ) ?

 

[hamza.k143]

I am sorry to say it !
she was right ,

You can go ask anyone my freind i told u the right answer

 

[Namehere]

Integration of 4/3x-2 .... I know it's simple but just can't get it .
I think answer is indefinite, Not possible!
Right?
Also derivative of 4/3x+2, i get a different answer :/

Integral of 4/(3x-2) dx = (4/3)log(3x-2) + c

 

[Namehere]

The derivative of 4/(3x-2) dx = -12/(2-3x)^2

 

[sitooon]

You can go ask anyone my freind i told u the right answer

Dont give others wrong information ! if you dont know the answer

 

[Namehere]

Well, atleast he tried to help... he can still make mistakes. It´s up to the receiver to believe what is being told to him/her and this usually comes from believing in yourself, researching and obviously by simply looking how confident the answer you are telling to him/her looks like.

 

[Thought blocker]

Full Please

 

[hamza.k143]

Dont give others wrong information ! if you dont know the answer

Swryyy did a miscalculation ur right

 

[ZaqZainab]

Full Please View attachment 38959