document.write( "Question 972740: Show that a1,a2,a3....an form an AP where an is defined as
\n" ); document.write( "an= 3+4n \n" ); document.write( "

Algebra.Com's Answer #594998 by amarjeeth123(569) $\"\"$ $\"About$

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We have an=3+4n
\n" ); document.write( "Substituting n+1 we get an+1=3+4(n+1)=4n+4+3=4n+7
\n" ); document.write( "Common difference d=an+1-an=4n+7-4n-3=4
\n" ); document.write( "Since the common difference d is constant they are in an arithmetic progression. \n" ); document.write( "

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