SOLUTION: The salary scale for a clerical officer starts at 1.1million per annum. A rise of 72000 is given at the end of each year.find the total amount of money earned in 12 years

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Question 1183447: The salary scale for a clerical officer starts at 1.1million per annum. A rise of 72000 is given at the end of each year.find the total amount of money earned in 12 years
Answer by ikleyn(52803) About Me  (Show Source):
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The salary scale for a clerical officer starts at 1.1million per annum.
A rise of 72000 is given
at the end of each year. find the total amount of money earned in 12 years
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The question is to find the sum of the first 12 terms of an arithmetic progression

with the first term  a%5B1%5D  of 1,100,000 and the common difference  d  of 72,000..


Use the formula for the sum of n first terms of an AP


    S%5Bn%5D = %28a%5B1%5D+%2B+%28n-1%29%2Ad%2F2%29%2An.


Complete this arithmetic on your own.

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For introductory lessons on arithmetic progressions see
    - Arithmetic progressions
    - The proofs of the formulas for arithmetic progressions
    - Problems on arithmetic progressions
    - Word problems on arithmetic progressions
in this site.

Also,  you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Arithmetic progressions".


Save the link to this textbook together with its description

Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson

into your archive and use when it is needed.