Mathematics: Post your doubts here!

[blymphocytes]

I had a question though......why are you not doing ln y^3??

 

[Hamnah Zahoor]

I had a question though......why are you not doing ln y^3??

In order to apply logarithm on 1/y^3 the derivative of y^3 should be present in the numerator then we can use it.

 

[blymphocytes]

In order to apply logarithm on 1/y^3 the derivative of y^3 should be present in the numerator then we can use it.

Oh ok.....so for example it was 2/y^3.........we could write this as 2ln(y^3)

 

[Hamnah Zahoor]

Oh ok.....so for example it was 2/y^3.........we could write this as 2ln(y^3)

No ....derivative of y^3 is 3y^2 this should be present.

 

[blymphocytes]

No ....derivative of y^3 is 3y^2 this should be present.

So 3y^2 should be the numerator?.......Always??

 

[blymphocytes]

So 3y^2 should be the numerator?.......Always??

Liek for all denominators....the numerator should be a derivative in order to use ln?

 

[Hamnah Zahoor]

So 3y^2 should be the numerator?.......Always??

yes

 

[Hamnah Zahoor]

Liek for all denominators....the numerator should be a derivative in order to use ln?

correct

 

[blymphocytes]

correct

Thanks <3

 

[Hamnah Zahoor]

Thanks <3

You are welcome

 

[Hamnah Zahoor]

Thanks <3

For remembrance it's given on the formula sheet

 

[blymphocytes]

For remembrance it's given on the formula sheet

Thanks.....once again!!!

 

[Hamnah Zahoor]

Thanks.....once again!!!

No problem

 

[fourtris46]

can anyone please send me the working of feb19 q3?

 

[Hamnah Zahoor]

can anyone please send me the working of feb19 q3?

 

[fourtris46]

in the last step, why did you multiply and divide with square root 2 ?

 

[Hamnah Zahoor]

in the last step, why did you multiply and divide with square root 2 ?

Just to simplify it more ..it's not a necessity .
And I just read the question it says no need to simplify the answer thus you can give the answer without multiplying and dividing by square root 2.

 

[fourtris46]

Just to simplify it more ..it's not a necessity .
And I just read the question it says no need to simplify the answer thus you can give the answer without multiplying and dividing by square root 2.

thank u so muchhhh

 

[Hamnah Zahoor]

thank u so muchhhh

You are welcome

 

[FaDGus]

Can someone possibly show me the working of question 5, feb march paper 32 2019?