Integrate these for me please (1 Viewer)

[abdog]

a)1/(6x+1)^2

b)3 tan x/x^2

 

[TheMathStudent]

first one use u=6x +1 if you cant see this straight away.

Second one seems like its too hard for a 2U exam. Are you sure you don't want to differentiate instead? Anyway the only thing I can think of use integration by parts by using dv=1/x^2, but this isn't part of 2U

 

[abdog]

It is 2U, can you help me with another one, 1/x+4?

 

[twinklegal19]

It is 2U, can you help me with another one, 1/x+4?

That is definitely not a 2U integration question

And its ln(x+4) + C

 

[abdog]

Then why are all these questions coming up in 2U papers?

 

[girlworld_club]

1/ (x+4)
= (x+ 4)^ -1
= (x + 4) ^1 / 1 + c
= (x+4) + c

(i think). i do 2 unit, btw.

 

[iBibah]

That is definitely not a 2U integration question

And its ln(x+4) + C

It is 2U...

Then why are all these questions coming up in 2U papers?

...but you learn to do them later on.

1/ (x+4)
= (x+ 4)^ -1
= (x + 4) ^1 / 1 + c
= (x+4) + c

(i think). i do 2 unit, btw.

That's incorrect, you will learn how to do such questions when you do logs.

 

[twinklegal19]

It is 2U...

really? you mean

?

I highly doubt it... unless I'm reading it wrong

 

[iBibah]

really? you mean

?

I highly doubt it... unless I'm reading it wrong

oh sorry i thought you meant the log one.