Chapter 5.3, Problem 36E

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Find the derivative of the function

Use the rules for the derivative of a product and the derivative of a quotient. 1) Find the equation of the line tangent to the graph of f (x) = (x? +1)(x³ + 1) at the point where x 1. 2) Find the point(s) at which the graph of f(x) = - has a horizontal tangent. 62 home end Insert prt sc F10 F4 F6 F7 & 23 %24 9. 4. 6. M *00 LE.

Find the third derivative of the given function.  Please write answer in a box