There were 2000 applicants for enrollment to the freshman class at a small college in the year 2010 The number of applications has risen linearly by roughly 150 per year. The number of applications f x is given by f x = 2000 + 150 x , where x is the number of years since 2010. a. Determine if the function g x = x − 2000 150 is the inverse of f . b. Interpret the meaning of function g in the context of this problem.
There were 2000 applicants for enrollment to the freshman class at a small college in the year 2010 The number of applications has risen linearly by roughly 150 per year. The number of applications f x is given by f x = 2000 + 150 x , where x is the number of years since 2010. a. Determine if the function g x = x − 2000 150 is the inverse of f . b. Interpret the meaning of function g in the context of this problem.
Solution Summary: The author explains that the function g(x)=x-2000150 is the inverse of the above function.
There were 2000 applicants for enrollment to the freshman class at a small college in the year 2010 The number of applications has risen linearly by roughly 150 per year. The number of applications
f
x
is given by
f
x
=
2000
+
150
x
,
where x is the number of years since 2010.
a. Determine if the function
g
x
=
x
−
2000
150
is the inverse of
f
.
b. Interpret the meaning of function g in the context of this problem.
1. Show that the vector field
F(x, y, z)
=
(2x sin ye³)ix² cos yj + (3xe³ +5)k
satisfies the necessary conditions for a conservative vector field, and find a potential function for
F.
1. Newton's Law of Gravitation (an example of an inverse square law) states that the magnitude
of the gravitational force between two objects with masses m and M is
|F|
mMG
|r|2
where r is the distance between the objects, and G is the gravitational constant. Assume that the
object with mass M is located at the origin in R³. Then, the gravitational force field acting on
the object at the point r = (x, y, z) is given by
F(x, y, z) =
mMG
r3
r.
mMG
mMG
Show that the scalar vector field f(x, y, z) =
=
is a potential function for
r
√√x² + y² .
Fi.e. show that F = Vf.
Remark: f is the negative of the physical potential energy, because F = -V(-ƒ).
2. Suppose f(x) = 3x² - 5x. Show all your work for the problems below.
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