Salary Increases A man gets a job with a salary of $ a year. He is promised a $ raise each subsequent year. Find his total earnings for a -year period.
Total earnings for a year period.
Starting salary $
Yearly raise $
Show that salary in subsequent years forms an arithmetic sequence and find the sum of first terms of this sequence.
Number of years for which we need to compute total earnings,
Salary in subsequent years forms the sequence:
which is an arithmetic sequence with first term and common difference .
Hence the term is which gives the salary in year
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