(Section 1.11: Limits and Derivatives in Calculus) 1.11.15 • Find x-coordinates of points where the tangent lines slope upward; their slopes are positive. Solve: ±Px()>0²2x+200>0²2x>²200x<100Therefore, Pis increasingon the x-interval 0,100. In fact, we can say that Pis increasing on 0, 100±²³´by a continuity argument. (See Section 1.2, Part H on when a function increaseson an interval.) • Find
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