Questions from General Calculus


Q: Suppose a population grows according to a logistic model with initial population

Suppose a population grows according to a logistic model with initial population 1000 and carrying capacity 10,000. If the population grows to 2500 after one year, what will the population be after an...

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Q: Solve the differential equation. du/dr = 1 +

Solve the differential equation. du/dr = 1 + √r/1 + √u

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Q: Graphs of populations of two species are shown. Use them to

Graphs of populations of two species are shown. Use them to sketch the corresponding phase trajectory.

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Q: Graphs of populations of two species are shown. Use them to

Graphs of populations of two species are shown. Use them to sketch the corresponding phase trajectory.

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Q: In Example 1(b) we showed that the rabbit and

In Example 1(b) we showed that the rabbit and wolf populations satisfy the differential equation By solving this separable differential equation, show that where C is a constant. It is impossible...

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Q: (a). Show that ∑∞n=0 xn/n

(a). Show that ∑∞n=0 xn/n! converges for all x. (b). Deduce that limn→∞ xn/n! = 0 for all x.

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Q: Biologists stocked a lake with 400 fish and estimated the carrying capacity

Biologists stocked a lake with 400 fish and estimated the carrying capacity (the maximal population for the fish of that species in that lake) to be 10,000. The number of fish tripled in the first yea...

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Q: (a). Show that if P satisfies the logistic equation (

(a). Show that if P satisfies the logistic equation (1), then d2P/dt2 = k2P (1 – P/M) (1 – 2P/M). (b). Deduce that a population grows fastest when it reaches half its carrying capacity.

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Q: A curve passes through the point (0, 5) and

A curve passes through the point (0, 5) and has the property that the slope of the curve at every point P is twice the y-coordinate of P. What is the equation of the curve?

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Q: A roast turkey is taken from an oven when its temperature has

A roast turkey is taken from an oven when its temperature has reached 1850F and is placed on a table in a room where the temperature is 750F. (a). If the temperature of the turkey is 1500F after half...

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