MATH 1211 Discussion Assignment Unit 4.pdf - Suppose a function f(t models the price of a stock at time t What material in this course could be used to

MATH 1211 Discussion Assignment Unit 4.pdf - Suppose a...

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Suppose a function, f(t), models the price of a stock at time t. What material in this course could be used to make money by buying and selling the stock? For a function, f(t), to invest in a stock, we would be interested in f '(t). When f'(t) is positive, f(t) increases. When f '(t) is negative, y(t) decreases. An increasing population means f' > 0, while an increasing growth rate means f" > 0. When f'(t) = 0 and f "(t) > 0, there is a local minimum at t. When f '(t) = 0 and f"(t) < 0, there is a local maximum at t. (Strang, G, 1991 pg. 106) A function with f "(x)> 0 is concave up. It bends upward as the slope increases, this is called convex. While a function with decreasing slope means f "(x)< 0 is concave down.
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