document.write( "Question 1055828: Given that four integers are consecutive terms of an arithmetic sequence with sum 24 and product 945, what is the biggest of these four integers? \n" ); document.write( "
Algebra.Com's Answer #670977 by KMST(5328)\"\" \"About 
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Since it is about 4 integers, consider divisibility.
\n" ); document.write( "\"945=3%5E3%2A5%2A7\" is the factorization for 945.
\n" ); document.write( "You notice that 3, 5, and 7 are factors of 945,
\n" ); document.write( "and the form an arithmetic sequence!
\n" ); document.write( "If those were 3 of the 4 factors whose product is 954,
\n" ); document.write( "The fourth factor would be
\n" ); document.write( "\"945%2F%283%2A5%2A7%29=3%5E3%2A5%2A7%2F%283%2A5%2A7%29=3%5E3=9\" .
\n" ); document.write( "So, \"3%2A5%2A7%2A9=945\" ,
\n" ); document.write( "and those 4 factors form an arithmetic sequence.
\n" ); document.write( "Of course, \"-9\" , \"-7\", \"-5\", and \"-3\" are another answer.
\n" ); document.write( "
\n" ); document.write( "USING EQUATIONS:
\n" ); document.write( "\"2x\"= common difference of the arithmetic sequence.
\n" ); document.write( "\"24%2F4=6\"= average (mean) and median of thev4 numbers.
\n" ); document.write( "Then, the numbers are
\n" ); document.write( "\"6-3x\" , \"6-x\" , \"6%2Bx\" , and \"6%2B3x\" .
\n" ); document.write( "The product is
\n" ); document.write( "\"%286-3x%29%286-x%29%286%2Bx%29%286%2B3x%29=945\"
\n" ); document.write( "\"%286%5E2-%283x%29%5E2%29%286%5E2-x%5E2%29=945\"
\n" ); document.write( "\"%2836-9x%5E3%29%2836-x%5E2%29=945\"
\n" ); document.write( "\"9%284-x%5E3%29%2836-x%5E3%29=945\"
\n" ); document.write( "\"%284-x%5E3%29%2836-x%5E2%29=105\"
\n" ); document.write( "\"144-40x%5E2%D7x%5E4=105\"
\n" ); document.write( "\"x%5E4-40x%2B39=0\"
\n" ); document.write( "\"%28x%5E2-1%29%28x%5E3-39%29=0\"
\n" ); document.write( "So,
\n" ); document.write( "EITHER,\"x%5E2=1\" ---> \"system%28x=1%2C%22or%22%2Cx=-1%29\" ,
\n" ); document.write( "which gives you the two arithmetic sequences found before,
\n" ); document.write( "OR \"x%5E2=39\" , which gives you
\n" ); document.write( "two arithmetic sequences of four (irrational) numbers,
\n" ); document.write( "asking up to 24, and with a product of 945.
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