Maths question help (2 Viewers)

[Roy216]

Could somebody please help me with (vi)?

 

[Roy216]

never mind, got it

 

[Carrotsticks]

Well I typed up a solution, so may as well post it:

 

[D94]

Could somebody please help me with (vi)?

View attachment 26027

Have you learned differentiation? It's just differentiating D² with respect to x.

D²' = 2x + 32ln(5-x).(-1/(5-x)) then make the common denominator of 5-x. Then the negative sign will carry into the denominator, which gives you the denominator of x-5, as required.

EDIT: too slow.

 

[Roy216]

Have you learned differentiation? It's just differentiating D² with respect to x.

D²' = 2x + 32ln(5-x).(-1/(5-x)) then make the common denominator of 5-x. Then the negative sign will carry into the denominator, which gives you the denominator of x-5, as required.

EDIT: too slow.

yeah i just forgot bout the differentiating with a bracket