
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN: 9780134463216
Author: Robert F. Blitzer
Publisher: PEARSON
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Question

Transcribed Image Text:The numbers in the sequence 1,3,6,10,15,21...
are called as triangular numbers. Determine
the 15th triangular number?
Select one:
a. 55
O b.
78
O C.
120
O d. 105
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