document.write( "Question 481369: Please help me solve this problem, thank you.\r
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document.write( "Which term of the arithmetic progression -7,-5,-3 . . . is 65? \n" );
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Algebra.Com's Answer #329643 by Maths68(1474)![]() ![]() You can put this solution on YOUR website! Tn=a+(n-1)d \n" ); document.write( "T=term \n" ); document.write( "n=Number of term \n" ); document.write( "a=first term \n" ); document.write( "d=Common difference \n" ); document.write( "In this particular series \n" ); document.write( "a=-7, \n" ); document.write( "d=-5-(-7)=-5+7=2 \n" ); document.write( "Tn=65\r \n" ); document.write( "\n" ); document.write( "Tn=a+(n-1)d \n" ); document.write( "65=-7+(n-1)2 \n" ); document.write( "65=-7+2n-2 \n" ); document.write( "65=-9+2n \n" ); document.write( "65-9=2n \n" ); document.write( "54=2n \n" ); document.write( "54/2=n \n" ); document.write( "27=n \n" ); document.write( "n=27 \n" ); document.write( "65 is the27 term of the series -7,-5,-3,.......65 \n" ); document.write( " |