How many m-digit decimal sequence (using digits 0, 1, 2, ... , 9; repetition may happen) are there in whichdigits 1, 2, 3 all appear?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.2: Arithmetic Sequences And Partial Sums
Problem 3ECP: The 8th term of an arithmetic sequence is 25, and the 12th term is 41. Write the first 11 terms of...
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How many m-digit decimal sequence (using digits 0, 1, 2, ... , 9; repetition may happen) are there in which
digits 1, 2, 3 all appear?

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