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bmelyk Group TitleBest ResponseYou've already chosen the best response.1
Use the appropriate rule or combination of rules to find the derivative of the function defined below. \[y=2(\sin(6x)+\cos(x^3))^\frac{ 1 }{ 2 }\]
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.1
not even sure how to start this one. ;( looks like it would the the chain rule of course.
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
first what is derivative of x^{1/2} = ?
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
we always go from outer function to inner function
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
\(y'=2(1/2)(\sin(6x)+\cos(x^3))^\frac{ 1 }{ 2 }d/dx(\sin(6x)+\cos(x^3))\)
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.1
options for the right answer are: \[a)2*\frac{ \cos(6x)\sin(x^3) }{ (\sin(6x)+cox(x^3))^1/2 }\] \[b)\frac{ \cos(6x) +\sin(x^3)}{ (\sin(6x)+\cos(x^3))^\frac{ 1 }{ 2 } }\] \[c)\frac{ 12 }{ 6x^\frac{ 1 }{ 2 } }*\cos(6x)\frac{ 6 }{ \cos(x^3)^\frac{ 1 }{ 2 } }*\sin(x^3)*x^2\] \[d)\frac{ 1 }{ (\sin(6x)^\frac{ 1 }{ 2 }+\cos(x^3))^\frac{ 1 }{ 2 } }\] \[e)\frac{ 6*\cos(6x)3x^2*\sin(x^3) }{ (\sin(6x)+\cos(x^3))^\frac{ 1 }{ 2 } }\] f) same as e only 2 outside of the fraction. \[g) \frac{ 2 }{ \sin(6x)+\cos(x^3))^1/2 }\] \[h) \frac{ 6 }{ \sin(6x)^\frac{ 1 }{ 2 } }*\cos6x\frac{ 3 }{ \cos(x^3)^\frac{ 1 }{ 2 } }*\sin(x^3)*x^2\]
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
u got my last comment ? how i got that ?
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.1
and i had that so far.
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.1
yesi got that.
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
so what is d/dx(sin(6x)+cos(x^3)) ?
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.1
do i use the product rule for sin*6x and cos*x^3?
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
there is no product, so NO u can treat them individually also what is d/dx (sin 6x) = ?
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
i mean only cos 6x ?
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
u need chain rule here too, right ?
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
yes! times 6, because u'll have d/dx(6x)
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
yup, what about 2nd term ? d/dx (cos (x^3)) = ?
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.1
sinx^3(3x^2)
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
absolutely correct! u got it :)
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
so which option is it ?
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
put everything together, and u'll get it.
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
yes, correct :)
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
i hope chain rule is clearer to u now.....
 2 years ago
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