document.write( "Question 1175030: Consider a population that grows according to the recursive rule Pn = Pn-1+60, with initial population Po=60.
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Algebra.Com's Answer #800558 by ikleyn(52847)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "This sequence is well known ARITHMETIC progression\r\n" );
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document.write( "with the first term of 60 and the common difference of 60.\r\n" );
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document.write( "Simply, the numeration is shifted one unit to the left and starts from 0 (very first term) instead of traditional 1.\r\n" );
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document.write( "The formula for the n-th term (accounting for the accepted numeration) is\r\n" );
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document.write( "    P(n) = 60 + n*60 = (n+1)*60,   n = 0, 1, 2, 3, . . . \r\n" );
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document.write( "To find any term (1st, 2nd, . . . , 100th), substitute the index value to the formula.\r\n" );
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document.write( "P1 = 120;  P2 = 180;   P100 = 101*60 = 6060.      ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "For introductory lessons on arithmetic progressions see \r
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\n" ); document.write( "\n" ); document.write( "Also,  you have this free of charge online textbook in ALGEBRA-II in this site\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic \"Arithmetic progressions\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-II
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