(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Can you please explain and show the steps of the ff.?

1. Find the derivative of the ff. f(x) = cos^5(2x^6)

2. Suppose f(1) = 2, f '(1) = 3 and f '(2) =4, then f^-1(2)=?

3. Find all points on the curve 2x^3 + 2y^3 -9xy= 0 where you will have a horizontal and vertical tangent lines.

2. Relevant equations

chain rule, i guess, and then the dx/dy thing if you have a y variable

3. The attempt at a solution

1. f'(x)= -sin(2x^6)* 2 ( but its not one of the choices)

2. I dont know what equation to use!

3. horixontal means slope is 0 and vertical means slope is undefine. I dont know what equation i need to set equal to zero and to undefine

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# Help in Calculus please?

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