document.write( "Question 1164237: A geometric progression has 6 terms. The first term is 192 and the common
\n" ); document.write( "ratio is 1.5. An arithmetic progression has 21 terms and common difference 1.5.
\n" ); document.write( "Given that the sum of all the terms in the geometric progression is equal to the
\n" ); document.write( "sum of all the terms in the arithmetic progression, find the first term and the last
\n" ); document.write( "term of the arithmetic progression.
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Algebra.Com's Answer #788554 by greenestamps(13200)\"\" \"About 
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\n" ); document.write( "I will let you have the pleasure of doing the calculations yourself....

\n" ); document.write( "(1) Find the 6 terms of the geometric progression. A calculator should make it easy; or an excel spreadsheet. Or you might be able to do it with mental arithmetic.

\n" ); document.write( "(2) Find the sum of those 6 terms.

\n" ); document.write( "(3) Divide that sum by the number of terms in the arithmetic progression, 21. That will give you the average of all the terms in the arithmetic progression.

\n" ); document.write( "(4) In an arithmetic progression of 21 terms the 11th term is the average of all the terms. So you know the 11th term.

\n" ); document.write( "(5) Add 10 times the common difference to the 11th term to find the 21st (last) term; subtract 10 time the common difference from the 11th term to find the first term.

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