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November 3rd, 2010, 10:31 PM   #1
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Questions in derivatives

Hi all

1 )

Finf the frisr derivative of y (t^2 + 2/6t)(t^4 - 3 /t^3)

my answer :

y = t^6 - 3t^2 + 2t^4-6/
6t^3
=6t^3-6t+t^-3

first derivative
18 - 6 + -3t

---------

2 ) tan(2 + cos3x)
derivative = sex^2x
=sex2xsin3x


3)sex2x.cos2x
derivative = cos2x.-sin2x now appy proudcur rule ?
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November 3rd, 2010, 10:45 PM   #2
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Re: Questions in derivatives

Oops....translation of your maths language is such an amazing thing!
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November 3rd, 2010, 11:31 PM   #3
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Re: Questions in derivatives

Quote:
Originally Posted by r-soy
Hi all

1 )

Finf the frisr derivative of y (t^2 + 2/6t)(t^4 - 3 /t^3)

my answer :

y = t^6 - 3t^2 + 2t^4-6/
6t^3
=6t^3-6t+t^-3

first derivative
18 - 6 + -3t

---------

2 ) tan(2 + cos3x)
derivative = censored^2x
=sex2xsin3x


3)sex2x.cos2x
derivative = cos2x.-sin2x now appy proudcur rule ?
1)

Is it ?

first derivative


2)

Is it ?



3)

Is it ?

,

so the derivative is 0....
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