1. Let f(x)=(x^2+1)(2x-3)
Find the equation of the line tangent to the graph of f(x) at x=3.
Find the value(s) of x where the tangent line is horizontal.
2. The total sales S of a video game t months after being introduced is given by the function
Find S(10) and S'(10). What do these values represent in terms of sales?
Use these results to estimate the total sales at t=11 months after the games release.
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