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Adonis Lee
Joined: 23 Jun 2004Posts: 4

Posted: Sat Nov 13, 2004 8:56 pm Post subject: Method of Differentiation



can you help me to solve these two questions?thank you
Last edited by Adonis Lee on Sat Nov 13, 2004 10:28 pm; edited 1 time in total





Soarer
Frequent VisitorJoined: 18 Jan 2004Posts: 181
Location: Hong Kong

Posted: Sat Nov 13, 2004 9:35 pm Post subject:



Remember differentiating a constant = 0.
Also remember log(A/B)=logAlogB





Kenny TM~
Frequent VisitorJoined: 20 Jan 2004Posts: 127

Posted: Sat Nov 13, 2004 11:59 pm Post subject:



2)
Are you sure the last equation is ? I think you mean . Remember that log 2 is a constant.
Also, this should be posted in High School Maths.





Adonis Lee
Joined: 23 Jun 2004Posts: 4

Posted: Wed Nov 17, 2004 7:17 am Post subject:



我都唔係好明, differentiating a constant = 0, 咁 d x —– (—) 係o米等於0???
dx a





Wilson
Frequent VisitorJoined: 20 Oct 2004Posts: 74

Posted: Wed Nov 17, 2004 6:30 pm Post subject:



Adonis Lee wrote:

我都唔係好明, differentiating a constant = 0, 咁 d x —– (—) 係o米等於0???
dx a

No, since “x/a” is dependent of x, so you should pick the constant 1/a out.
d/dx (x/a) = (1/a) dx/dx = 1/a





