document.write( "Question 1162725: The first and last term if an AP are -0.5 and 140.5, respectively.
\n" ); document.write( "(Q1) If the number of terms in the sequence is 48, find its common difference.
\n" ); document.write( "(Q2) the first term of an Arithmetic progression is -8. The ratio of the 7th term to the 9th term is 5 : 8, calculate the common difference of the progression
\n" ); document.write( "(Q3) show that each of the following sequence is an AP; 3n+4 14-4n and 4n-2 \n" ); document.write( "

Algebra.Com's Answer #786557 by ikleyn(52778) $\"\"$ $\"About$

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document.write( "(Q1)  The distance from -0.5 to 140.5 in number line is  141 unit.\r\n" );
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document.write( "      There are 47 intervals between the 48 terms - the 48 points in the number line.\r\n" );
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document.write( "      These intervals are of equal length, since each interval length is the common difference of the AP.\r\n" );
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document.write( "      Thus each such interval has the length of   = 3 units, and it it is the value of the common difference to this AP.    ANSWER\r\n" );
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