Find the derivative of the following function:
f(x) = (2x-3)^2/(x^3-7)^3
I am very confused here. Don't know what rule to use, as the exponents are outside the bracket. I would appreciate any help!
Thanks
thanks guys!
So I end up with the following result (am very unsure about it):
Derivative:
$\displaystyle 2x-3(4(x^6-32x^3+27x^2+49))$
---------------------------------
$\displaystyle (x-7)^6$
can some one please confirm if this is the correct answer.I would really appreciate it!
Thanks
Just in case you're interested (like many people) in avoiding the quotient rule, which can feel like overkill, and always doubles the power of the denominator, sometimes unnecessarily as here... then, how about...
... where
... is the product rule, straight lines differentiating downwards with respect to x. Then you don't need u and v. You still need the chain rule, but you can zoom in on this, for example in the right hand fork...
... where...
... is the chain rule. Straight continuous lines still differentiate downwards (integrate up) with respect to x, and the straight dashed line similarly but with respect to the dashed balloon expression (the inner function of the composite which is subject to the chain rule).
Spoiler:
Another way of avoiding the quotient rule is logarithmic differentiation - taking logs of both sides of y = the function. Then solve for dy/dx in the bottom row of...
Spoiler:
_________________________________________
Don't integrate - balloontegrate!
Balloon Calculus; standard integrals, derivatives and methods
Balloon Calculus Drawing with LaTeX and Asymptote!
ok here's the working:
$\displaystyle f(x)=(2x-3)^2/(x^3- 7)^3 $
$\displaystyle f' (x)=((x^3-7)^3 [2(2x-3)(2) ]-[3(x^3-7)^2 (3x^2 )])/[(x^3-7)^3 ]^2 $
$\displaystyle f' (x)=((x^3-7)^3 [4(2x-3)]-[9x^2 (x^3-7)^2](2x-3)^2)/(x^3-7)^6 $
We need to simplify:
$\displaystyle f' (x)=((x^3-7)[4(2x-3) ]-(9x^2)(2x-3)^2)/(x^3-7)^4 $
We need to simplify Further:
$\displaystyle f' (x)=(2x-3)[4(x^3-7)-9x^2 (2x-3) ]/(x^3-7)^4 $
thats my final answer ^^...I am supposed to represent the derivative in its simplified form..Is my working correct?
Thank you!