BOS 2012 Question (1 Viewer)

[Fade1233]

Is this valid:


For the last part is it valid to differentiate and then then let r=n/2 for the RHS?

 

[faisalabdul16]

Is this valid:
View attachment 30956

For the last part is it valid to differentiate and then then let r=n/2 for the RHS?

The question says "Hence Show that," did you use previous result?

 

[Carrotsticks]

Is this valid:
View attachment 30956

For the last part is it valid to differentiate and then then let r=n/2 for the RHS?

Differentiate with respect to what?

Keep in mind that we are dealing with discrete values here, whereas differentiation is mostly dealing with continuity.

 

[Fade1233]

The question says "Hence Show that," did you use previous result?

No but I used a similar method of substitution as in the second part. Doesn't that satisfy the 'hence show that'? But otherwise does it work?