Hard HSC question (1 Viewer)

[BlueGas]

I was looking at the solutions and I dont understand the 4th step where x turned to 2x. Also how do you differentiate 2x and you get 2x^2 in part ii?

 

[BreathingMaths]

They multiplied the 1/2 inside the big brackets.

 

[rand_althor]

For i) they multiplied everything in the brackets by 1/2.


For ii) you aren't differentiating x, rather x^{-1}

 

[Drsoccerball]

They brought half into the brackets

 

[Drsoccerball]

For i) they multiplied everything in the brackets by 1/2. For ii) you aren't differentiating x^2, rather x^{-2}

dat timing

 

[SlimiJay]

what hsc question is this?

 

[rand_althor]

what hsc question is this?

2008 2U Question 10 (b)

 

[Drsoccerball]

They multiplied the 1/2 inside the big brackets.

Edits his post haha