document.write( "Question 709818: Evaluate the arithmetic series 8+17+26+35...,n=13 \n" ); document.write( "

Algebra.Com's Answer #436788 by MathLover1(20850) $\"\"$ $\"About$

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\n" ); document.write( "general formula is $\"%28-1+%2B+9n%29\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=1\"$ ...=>... $\"%28-1+%2B+9%2A1%29=8\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=2\"$ ...=>... $\"%28-1+%2B+9%2A2%29=-1%2B18=17\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=3\"$ ...=>... $\"%28-1+%2B+9%2A3%29=-1%2B27=26\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=4\"$ ...=>... $\"%28-1+%2B+9%2A4%29=-1%2B36=35\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=5\"$ ...=>... $\"%28-1+%2B+9%2A5%29=-1%2B45=44\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=6\"$ ...=>... $\"%28-1+%2B+9%2A6%29=-1%2B54=53\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=7\"$ ...=>... $\"%28-1+%2B+9%2A7%29=-1%2B63=62\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=8\"$ ...=>... $\"%28-1+%2B+9%2A8%29=-1%2B72=71\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=9\"$ ...=>... $\"%28-1+%2B+9%2A9%29=-1%2B81=80\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=10\"$ ...=>... $\"%28-1+%2B+9%2A10%29=-1%2B90=89\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=11\"$ ...=>... $\"%28-1+%2B+9%2A11%29=-1%2B99=98\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=12\"$ ...=>... $\"%28-1+%2B+9%2A12%29=-1%2B108=107\"$ \r
\n" ); document.write( "\n" ); document.write( "for $\"n=13\"$ ...=>... $\"%28-1+%2B+9%2A13%29=-1%2B117=116\"$ \r
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