burhan101
Find the derivative



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burhan101
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\[\huge y=(15d)e^{\frac{ d }{ 5 }}\]

cwrw238
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6 penguins on board!

burhan101
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\[\huge y= (15d)'(e^{\frac{ d }{ 5 }})+(15d)((e^{\frac{ d }{ 5 }})'\]

burhan101
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y'= *

Azteck
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Are you differentiating with respect to d or x?

Azteck
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Or is d a constant?

Azteck
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"d"*

burhan101
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\[\huge y'= 15(e^{\frac{ d }{ 5 }})30d(e^{\frac{ d }{ 5 }})\]

Azteck
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Ah sorry, my eyes went somewhere. Sorry about that.

burhan101
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d is a constant :P

Azteck
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d is the variable, not a constant.

Azteck
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and you are almost correct. The 30 is not right.

cwrw238
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check your second part of your answer

cwrw238
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(e^(d/5)' = (1/5)e*(d/5)

Azteck
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@burhan101 are you there? If you are, please read what cwrw238 has written above.

burhan101
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@cwrw238 im a little confused

burhan101
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dw:1371805163917:dw @Azteck @cwrw238

Azteck
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\[\frac{1}{5}\times 15=75???\]

Azteck
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I think you got confusde about 1/5 and 5 when multiplying.

Azteck
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confused*

burhan101
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oppps 3*

burhan101
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dw:1371805796678:dw

burhan101
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@Azteck

Azteck
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Yep, excellent!

Azteck
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Well done.

burhan101
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One more question

burhan101
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if i solve for d, will i have to use ln ?

burhan101
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nvm i got it :P