Problems 51 − 60 are based on material learned earlier in the course. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for the final exam. If f ( x ) = x + 1 x and g ( x ) = 3 x − 2 , find ( g f ) ( x ) and state its domain.
Problems 51 − 60 are based on material learned earlier in the course. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for the final exam. If f ( x ) = x + 1 x and g ( x ) = 3 x − 2 , find ( g f ) ( x ) and state its domain.
Solution Summary: The author explains that the domain of a function is the set of input values at which it is real and defined.
Problems
51
−
60
are based on material learned earlier in the course. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for the final exam.
If
f
(
x
)
=
x
+
1
x
and
g
(
x
)
=
3
x
−
2
, find
(
g
f
)
(
x
)
and state its domain.
Consider the following system of equations, Ax=b :
x+2y+3z - w = 2
2x4z2w = 3
-x+6y+17z7w = 0
-9x-2y+13z7w = -14
a. Find the solution to the system. Write it as a parametric equation. You can use a
computer to do the row reduction.
b. What is a geometric description of the solution? Explain how you know.
c. Write the solution in vector form?
d. What is the solution to the homogeneous system, Ax=0?
2. Find a matrix A with the following qualities
a. A is 3 x 3.
b. The matrix A is not lower triangular and is not upper triangular.
c. At least one value in each row is not a 1, 2,-1, -2, or 0
d. A is invertible.
Chapter 4 Solutions
Mylab Math With Pearson Etext -- Standalone Access Card -- For Precalculus (11th Edition)
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