a.
To find the points on the line at which the polynomial is zero.
a.
Answer to Problem 90E
Explanation of Solution
Given information:
Consider the polynomial
Identify the points on the line at which the polynomial is zero.
Calculation:
Here, we will consider the polynomial
From the above real number line, we can observed that the polynomial
Hence,
b.
To write the sign of each factor and the sign of the product.
b.
Answer to Problem 90E
Explanation of Solution
Given information:
Consider the polynomial
In each of the three subintervals of the line, write the sign of each factor and the sign of the product.
Calculation:
From the above real number line, we can observed that the three sub intervals are
Now, for the sub interval
If,
So,
Hence, as both
Now, similarly for the sub interval
If,
So,
Hence, as
Now, for the sub interval
If,
So,
Hence, as both
c.
To find at what values does the polynomial change signs?
c.
Answer to Problem 90E
Explanation of Solution
Given information:
Consider the polynomial
At what values does the polynomial change signs?
Calculation:
The polynomial
Chapter 2 Solutions
EBK PRECALCULUS W/LIMITS
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