Concept explainers
(a)
Explain why the given expression is not a real number.
(a)
Explanation of Solution
Given:
The expression is :
Calculation:
Given:
Since the index is 4 , which is even , so the radicand cannot be negative.
Here the radicand is negative.
Hence the number is imaginary and not real .
(b)
Find n such that
(b)
Answer to Problem 67HP
Explanation of Solution
Given:
The expression is :
Calculation:
Given:
Since the index is 4 , which is even , so the radicand cannot be negative.
So, to make it a real number, we need to eliminate the negative sign under the radical .
Let
Check:
And 8 is a real number.
So,
Chapter 7 Solutions
Algebra 2
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