Posted by **Ak** on Tuesday, November 3, 2009 at 12:42am.

a high speed office copier has an initial price of $1800. a service contract cost $270 for the first year and increases by $100 per year thereafter. it can be shown that over x years the total cost of thecopier is given by C(x)=1800+220x+50X^2

When is the average cost per yr smallest?

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