Fis a twice differentiable function that is defined for all reals. the value of f "(x) is given for several values of x in the table below. x –8 –3 0 3 8 f " (x) –4 –2 0 4 5 if f " (x) is always increasing, which statement about f(x) must be true? f(x) is concave downwards for all x. f(x) passes through the origin. f(x) has a relative minimum at x = 0. < - my answer f(x) has a point of inflection at x = 0.

The correct answer is actually the last one.

The second derivative gives us information about the concavity of a function: if then the function is concave downwards in that point, whereas if then the function is concave upwards in that point.

This already shows why the first option is wrong - if the function was concave downwards for all x, then the second derivate would have been negative for all x, which isn't the case, because we have, for example,

Also, the second derivative gives no information about specific points of the function. Suppose, in fact, that passes through the origin, so . Now translate the function upwards, for example. we have that doesn't pass through the origin, but the second derivative is always . So, the second option is wrong as well.

Now, about the last two. The answer you chose would be correct if the exercise was about the first derivative . In fact, the first derivative gives information about the increasing or decreasing behaviour of the function - positive and negative derivative, respectively. So, if the first derivative is negative before a certain point and positive after that point. It means that the function is decreasing before that point, and increasing after. So, that point is a relative minimum.

But in this exercise we're dealing with second derivative, so we don't have information about the increasing/decreasing behaviour. Instead, we know that the second derivative is negative before zero - which means that the function is concave downwards before zero - and positive after zero - which means that the function is concave upwards after zero.

A point where the function changes its concavity is called a point of inflection, which is the correct answer.

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the population of other specie of birds will decline or other specie of birds will find some alternate source of food to survive.

explanation:

according to the competitive exclusion principle, which is also known as gause's law, two specie living in the same niche and feeding on the same resource cannot co-exist stably.

as we have well studied the theory of natural selection which states that only those organisms survive which have better tendency to compete for food and adapt to the environmental conditions.

coming towards the question, what wi ll happen when one species outcompetes the other for the small fish , the other specie will not get enough food and will start to die or decline in population. eventually either other specie needs to find another alternative food source for itself or migrate at some other location where there is less competition otherwise it will just not exist anymore at that niche.

hope it !