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OpenStudy (unklerhaukus):
do you remember the chain rule ?
OpenStudy (anonymous):
no
OpenStudy (unklerhaukus):
\[(f\circ g)'(t)=f'(g(t))\cdot g'(t)\]
OpenStudy (unklerhaukus):
where \(f\circ g=f(g(t))\)
OpenStudy (unklerhaukus):
in your question
f =sin
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OpenStudy (unklerhaukus):
can you tell me what g(x) is ?
OpenStudy (anonymous):
sin
OpenStudy (unklerhaukus):
nope,
OpenStudy (anonymous):
then ..
can u solve this derived
OpenStudy (unklerhaukus):
To take the derivative of the function-of-a-function, you have to be able to identify the functions
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OpenStudy (unklerhaukus):
your function is
\[y=\sin\left(\frac{x+1}{2x−3}\right)\]
you need to decompose \(y=f(g(x))\)
\[f=\sin \\\,
\\\,\\
g(x)=?\]
OpenStudy (anonymous):
x+1/2x-3
OpenStudy (unklerhaukus):
ok, so now look at the rule for takig the derivative of a function-of-a-function
\[(f(g(t)))'=(f∘g)'(t)=f'(g(t))⋅g'(t)\]
OpenStudy (unklerhaukus):
you need to take the derivative of f,
\[f=\sin\\f'= \]
OpenStudy (anonymous):
cos
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OpenStudy (unklerhaukus):
correct ,
OpenStudy (unklerhaukus):
now all you need before you can subsitut into that formula is to find
\[g'(t)\]
this is a bit tricker , and you might want to use the quotient rule
\[y=\frac{u}{v}\\y'=\frac{vu'-uv'}{v^2}\]
OpenStudy (unklerhaukus):
so you will have to decompose
\[\frac{x+1}{2x−3}\]
onto \(\dfrac uv\) form
and then find \(u,u',v,v',v^2\)
OpenStudy (anonymous):
nd cos ..?
OpenStudy (unklerhaukus):
pardon
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