Concept explainers
a.
To calculate: The next two pentagonal numbers.
a.
Answer to Problem 32WE
The pentagonal numbers are
Explanation of Solution
Given information:
Now, the next figure is
Hence, the pentagonal numbers is
Now, next of next pentagonal numbers
Hence, the pentagonal numbers is
b.
To calculate: The tenth pentagonal numbers.
b.
Answer to Problem 32WE
The pentagonal numbers,
Explanation of Solution
Given information:
When,
When,
When,
When,
Similarly,
When,
Hence, pentagonal numbers,
Chapter 11 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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