Let f x = x 2 − 4 x 8 / 3 . Given that f ′ x = − 2 x 2 − 16 3 x 11 / 3 , f ″ x = 2 5 x 2 − 176 9 x 14 / 3 determine the following properties of the graph of f . (a) The x -intercepts are ________ . (b) The vertical asymptotes are ________ . (c) The horizontal asymptote is ________ . (d) The graph is above the x -axis on the intervals ________ . (e) The graph is increasing on the intervals ________ . (f) The graph is concave up on the intervals ________ . (g) Inflection points occur at x = ________ .
Let f x = x 2 − 4 x 8 / 3 . Given that f ′ x = − 2 x 2 − 16 3 x 11 / 3 , f ″ x = 2 5 x 2 − 176 9 x 14 / 3 determine the following properties of the graph of f . (a) The x -intercepts are ________ . (b) The vertical asymptotes are ________ . (c) The horizontal asymptote is ________ . (d) The graph is above the x -axis on the intervals ________ . (e) The graph is increasing on the intervals ________ . (f) The graph is concave up on the intervals ________ . (g) Inflection points occur at x = ________ .
Let
f
x
=
x
2
−
4
x
8
/
3
. Given that
f
′
x
=
−
2
x
2
−
16
3
x
11
/
3
,
f
″
x
=
2
5
x
2
−
176
9
x
14
/
3
determine the following properties of the graph of
f
.
(a) The x-intercepts are
________
.
(b) The vertical asymptotes are
________
.
(c) The horizontal asymptote is
________
.
(d) The graph is above the x-axis on the intervals
________
.
(e) The graph is increasing on the intervals
________
.
(f) The graph is concave up on the intervals
________
.
A body of mass m at the top of a 100 m high tower is thrown vertically upward with an initial velocity of 10 m/s. Assume that the air resistance FD acting on the body is proportional to the velocity V, so that FD=kV. Taking g = 9.75 m/s2 and k/m = 5 s, determine: a) what height the body will reach at the top of the tower, b) how long it will take the body to touch the ground, and c) the velocity of the body when it touches the ground.
A chemical reaction involving the interaction of two substances A and B to form a new compound X is called a second order reaction. In such cases it is observed that the rate of reaction (or the rate at which the new compound is formed) is proportional to the product of the remaining amounts of the two original substances. If a molecule of A and a molecule of B combine to form a molecule of X (i.e., the reaction equation is A + B ⮕ X), then the differential equation describing this specific reaction can be expressed as:
dx/dt = k(a-x)(b-x)
where k is a positive constant, a and b are the initial concentrations of the reactants A and B, respectively, and x(t) is the concentration of the new compound at any time t. Assuming that no amount of compound X is present at the start, obtain a relationship for x(t). What happens when t ⮕∞?
Consider a body of mass m dropped from rest at t = 0. The body falls under the influence of gravity, and the air resistance FD opposing the motion is assumed to be proportional to the square of the velocity, so that FD = kV2. Call x the vertical distance and take the positive direction of the x-axis downward, with origin at the initial position of the body. Obtain relationships for the velocity and position of the body as a function of time t.
Chapter 4 Solutions
Calculus Early Transcendentals, Binder Ready Version
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