
Concept explainers
a.
To graph: The function p(x)=x5−x4+1 .
a.

Explanation of Solution
Given information:
The polynomial p(x)=x5−x4+1 .
Graph:
Consider the equation p(x)=x5−x4+1
Construct a table of values,
xp(x)−3−323−2−47−1−101112173163
Connect the points obtained above to obtain a smooth curve.
Interpretation:
The function p(x)=x5−x4+1 has 1 real zero at as the graph intersects the x-axis at one point.
b.
To calculate: The consecutive integer values of x at which real zero is located.
b.

Answer to Problem 32SGR
The real zero of the function is located between, x=−1 and x=0.
Explanation of Solution
Given information:
The function p(x)=x5−x4+1 .
Calculation:
Consider the function p(x)=x5−x4+1 .
Construct a table of values,
xp(x)−3−323−2−47−1−101112173163
Recall that if for a polynomial function and a and b are two real numbers such that f(a)<0 and f(b)>0 . Then the function has at least one real zero between a and b.
From the above table the changes in sign at integer values indicate that zeros of the function lie between x=−1 and x=0 .
c.
To calculate: The approximate x-coordinates where relative
c.

Answer to Problem 32SGR
The function has relative minima near x=1 and relative maxima near x=0 .
Explanation of Solution
Given information:
The function p(x)=x5−x4+1 .
Calculation:
Consider the function p(x)=x5−x4+1 .
Construct a table of values,
xp(x)−3−323−2−47−1−101112173163
The function has relative high and low values of function. A function has relative minimum when no other near by point has a lesser y-coordinate. A function has
Observe from the table that the polynomial function p(x)=x5−x4+1 has the value greater than the surrounding points at x=0 , so there must be a relative maximum at this point.
Similarly, the polynomial function p(x)=x5−x4+1 has the value less than the surrounding points at x=1 , so there must be a relative minimum at this point.
Thus, the function has relative minima near x=1 and relative maxima near x=0 .
Chapter 5 Solutions
Glencoe Algebra 2 Student Edition C2014
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