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Differentiating exponentials and logarithms
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IGCSE/GCSE/O & A Level/IB/University Student Forum
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GCE AS & A2 Level
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Differentiating exponentials and logarithms
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Topic: Differentiating exponentials and logarithms (Read 3579 times)
nid404
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Re: Differentiating exponentials and logarithms
«
Reply #15 on:
July 25, 2010, 01:22:57 pm »
ohkay gimme some time.
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nid404
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Re: Differentiating exponentials and logarithms
«
Reply #16 on:
July 26, 2010, 12:34:51 pm »
4 D
1 f)
= 0- (-2+ ln|(-2)|
= 2-ln 2
«
Last Edit: July 26, 2010, 12:37:45 pm by ~Ahana~
»
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nid404
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Re: Differentiating exponentials and logarithms
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Reply #17 on:
July 26, 2010, 12:38:37 pm »
I'll have a nap and do the rest
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nid404
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Re: Differentiating exponentials and logarithms
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Reply #18 on:
July 26, 2010, 03:02:46 pm »
Quote from: mousa on July 25, 2010, 01:06:02 pm
Miscellaneous. 1 E., Q4,5,6,7
1) e)
ln |2-x| - ln |3-x|
dy/dx= 1/2-x d(2-x)dx - 1/3-x d(3-x)/dx
= -1/2-x + 1/3-x
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nid404
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Re: Differentiating exponentials and logarithms
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Reply #19 on:
July 26, 2010, 03:45:13 pm »
5)
6) y= 2x
2
-lnx
dy/dx= 4x- 1/x
4x-1/x= 0
4x
2
=1
x
2
=0.25
x= 0.5
dy/dx greater than zero...hence minimum
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mousa
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Posts: 233
Reputation: 447
Re: Differentiating exponentials and logarithms
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Reply #20 on:
July 27, 2010, 12:01:35 pm »
Thank you Ahana
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IGCSE/GCSE/O & A Level/IB/University Student Forum
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Differentiating exponentials and logarithms
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